"We do not and will not interfere in any country's domestic affairs", Chinese Foreign Minister Wang Yisaid at the Security Council meeting, through a translator.
"Regrettably, we found that China has been trying to interfere in 2018 election against my administration", the president said.
The president has at times expressed scepticism over whether Russian Federation interfered in the 2016 U.S. presidential election, a subject that remains a thorn in Trump's side.
There are concerns that the November elections could also be vulnerable.
Opening the UN Security Council meeting in NY, which was held to discuss countering nuclear, chemical and biological weapons, Mr Trumpaccused China of trying to interfere, without providing specific evidence.
Trump also doubled down on his earlier accusations that Beijing was looking to meddle in the US congressional elections later this year, but did not offer any specific details.
Some in the audience also grumbled during Trump's remarks when he said "we reject the ideology" of globalism.
The editorial went on to say that his position on trade with China is something that could hurt the president's party in the upcoming mid-term elections and his aspirations for re-election in 2020.
Later Wednesday, Trump said in a tweet: "China is actually placing propaganda ads in the Des Moines Register and other papers, made to look like news". The notice, published by the China Digital Times, said the Chinese tariffs are meant to split "apart different domestic groups in U.S".
US President Donald Trump at United Nations headquarters on September 25, 2018.
Image Mr Trump took aim at China at the UN Security Council meeting
President Trump has campaigned for such a deal in the past, noting the current agreement has caused Japan to accumulate a massive surplus.
But they added they are concerned about activity from Russia, China, Iran and North Korea.
Trump was broadly criticised after he appeared to side with Russian President Vladimir Putin over the U.S. intelligence community on the subject when they met in Helsinki, Finland, in July. But I want to open up China to our farmers, and to our industrialists, and our companies.
At no point on Wednesday did the president make similar pronouncements about Russian Federation, which the USA intelligence community long ago accused of engaging in a coordinated influence campaign to boost Mr. Trump's chances of being elected in 2016.
But Trump followed up his accusations with a series of tweets accusing China's government of paying for newspaper space in the U.S. state of Iowa to push its message.
The high-profile Security Council meeting came a day after Trump poured scorn on the "ideology of globalism" and heaped praise on his own administration's achievements in a speech to the UN General Assembly that drew head shakes and even mocking laughter from his audience of fellow world leaders.
Trump spoke to the Security Council on a number of issues but made a point of criticizing the regime in China for working against global peace.
The president went on to say USA agencies are working to monitor the situation.
Earlier in September, Mr Trump directed officials to impose tariffs on $200bn (£151bn) in Chinese goods - the latest move to combat what the U.S. says are China's unfair trade practices, such as state subsidies. Only under the guise of foreign interference do the American people feel that they need someone like Trump.
Fleming said it's time businesses and the general public realized the extent and the seriousness of China's true intentions: to rule the world.
His colleague Bret Baier said that hearing Ford's testimony was "a totally different thing" than reading about her allegation. I still like beer". "I like beer", he said, but he also said he'd never passed out and never attacked Ford.
In his address previous year to the UN, Trump insulted Mr Kim as a "rocket man" bent on nuclear destruction. Also: "We will not be governed by an worldwide body that is unaccountable to our own citizens".
The biggest shock came at Old Trafford on Tuesday as Derby knocked out Manchester United on penalties in a dramatic contest. Only a stoppage time header from united substitute Marouane Fellaini had stopped them from victory.
She kept them a secret, until after Kavanaugh's public hearing and after lengthy meetings with Judge Kavanaugh. Avenatti said the Republicans on the Judiciary were working hard to stifle any new information abut Kavanaugh.
The FBI had already completed a background check on Kavanaugh, and it was unclear what the parameters of the new inquiry would be. Kavanaugh said in a statement Friday that he would continue to cooperate with investigators to clear his name.
Maddox , a 6-year-old autistic boy who doesn't speak, reportedly vanished from the Gastonia area park on Saturday. Both parents begged the public to call the tip line at 704-869-1075 with any information about their son.
It's the name of the popular comic book arc in which Jean is taken over by the cosmic entity known as the Phoenix Force. As she battles with this new reality, Jean unleashes her powers in ways she can't understand or contain.
President Joko Widodo said on Saturday that troops were en route to the area to reinforce rescue teams and help retrieve bodies. Indonesia's disaster agency said at least 48 people have been killed from the latest quake but that the figure could rise.
Meanwhile, Ronaldo will definitely miss Juve's next Champions League game at home to Young Boys after his sending off. Cristiano Ronaldo is set to face Manchester United despite being sent off on his Champions League debut for Juventus .
Chelsea 1 Liverpool 1: Sturridge stunner rescues point
Salah scored 32 Premier League goals last season but he is yet to replicate the same form that crowned him PFA Player of the Year. Liverpool's ideal start to the Premier League season came to an end after they drew 1-1 with Chelsea at Stamford Bridge.