China's foreign ministry says the US has flown balloons into its airspace more than 10 times in the past year.
It comes after the US on 4 February shot down a suspected spy balloon over its airspace - which China said was one of its weather balloons gone astray.
Relations between the two countries have since deteriorated. In recent days, the US has also shot down a number of other unidentified objects.
Questioned on Monday, Beijing said the US had made many airspace breaches.
"It's not uncommon as well for the US to illegally enter the airspace of other countries," said foreign ministry spokesman Wang Wenbin at a regular press briefing.
"Since last year alone, US balloons have illegally flown above China more than 10 times without any approval from Chinese authorities."
"The first thing the US side should do is start with a clean slate, undergo some self-reflection, instead of smearing and accusing China," he added.
He said Beijing had responded to the incursions in a "responsible and professional" manner.
"If you want to know more about US high-altitude balloons illegally entering China's airspace, I suggest you refer to the US side," he said.
Chinese state-affiliated media reported over the weekend that an unidentified flying object had been spotted off the country's east coast, with the military preparing to shoot it down.
The White House denied Beijing's accusation that it sent balloons over China to conduct surveillance, with National Security Council spokesperson Adrienne Watson calling the claims "false" on Twitter.
The first balloon incident led US Secretary of State Antony Blinken to cancel a planned trip to Beijing. The top diplomat called China's alleged high-altitude spying "unacceptable and irresponsible".
On Sunday, the US ordered an unmanned "octagonal structure" to be downed in Michigan near the Canadian border - the fourth object to be taken out in eight days.
Fighter pilots also shot down smaller unidentified objects over Alaska on 10 February and northern Canada on 11 February.
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