Mozi is a famous thinker , strategist and educator in the history of China, at the same time,he is also one of the earliest physicist in Chinese history. Mozi has cross-cutting progress and great academic achievements in time-space, cosmology, mechanics, acoustics, optics, and the applications of physics to mechanics. Previous study of Mozi mainly concentrated in such aspects as philosophy, cultural, political and military, but he made great contribution to the physics should not be neglected. Mozi was in the Spring and Autumn and the Warring States period, his many contributions to physics all reflected on the military and had a huge influence.