Abstract: The training of mechanics thinking is the “higher order” location for the training objectives of mechanics major. The practice of selecting topic training applies theoretical knowledge to solve practical problems and devote to the training of thinking ability. In order to achieve the goal of advanced teaching training, the teaching design and implementation of practice topic selection training for basic theory course of mechanics need further consideration. In this research, the motion of the free rigid body in theoretical mechanics course was taken as an example, the relevant structure framework of knowledge points at multiple levels was constructed, the implementation scheme of practice teaching training from multiple perspectives was designed, and the practice teaching method of mechanical thinking ability training for undergraduate students majoring in mechanics was explored.