The new weapon – the US's biggest selling to Taiwan in years – could further undermine relations with Beijing, as the self-governing island is considered part of China.
Beijing quickly hit the planned sale as it was first reported last week.
On Friday, Chinese Foreign Ministry spokesman Hua Chunying said US arms sales to Taiwan are undermining China's sovereignty and core interests.
China "resolutely rejects this," Hua said, calling on the US not to sell the fighter jets and put an end to military contact with Taiwan.
"It has to be stressed that the Taiwan issue concerns China's sovereignty, territorial integrity and security interests," Hua said, adding a warning. The "US will have to bear all the consequences" if it does not stop the sale of arms, she said.