Abstract: The Ming and Qing dynasties were the important period to integrate Chinese mechanics knowledge with the western’s. The spread abroad and uses of mathematics sign is a reduction of mechanics knowledge in the Ming and Qing dynasties. The popularization of mathematics sign in mechanics knowledge implicated the process that the western science transmit to china. With the internationalization of science, mechanics knowledge of the Ming and Qing dynasties was described in western mathematics sign language and was used extensively in the mechanical books during Ming and Qing dynasties.

Key words: The Ming and Qing dynasties, mechanics, mathematics sign, maths modernization