The purpose of the research is to understand what the judo training is and the connection between the physical training and police duty. The article discovers the document about the physical training, analyzing the original background and developing process in the police bureau and discussing it from the policy, regulation, inspection and training. The conclusion of the research shows the functions of the physical training, including fostering the strong body and mild mind, sharpening the self-protecting skill to accomplish the mission, improving the relationship between the police and citizens, and providing the grovnds teachers to assist in populizing the judo sports in communities. The reserch discovers that there are historical reasons and interdependent relations for the Police bureaus emphasize the judo training. The training items are diversifying to reach the duty demands and conform to physical training goals.