Theoretical Mechanics C" course is a professional master course in the professional knowledge class of applied physics, and "Theoretical Mechanics" uses advanced mathematics tools on the basis of "Mechanics", the basic course of physics, to comprehensively and systematically expound the general law of macro-mechanical movement. Its physical thought and physical method are the essential basis for solving practical physical problems. This course is not only a continuation of the content of the physics major "Force" course, but also the basis of the follow-up professional course. Its first course is in magic. This course is suitable for undergraduate studies in physics. This course focuses on Newtonian and analytical theory. The content includes the laws and applications of motion and dynamics of the mass and mass systems. The basic law of object movement in the field of heart force; The basic laws and applications of rigid body motion, including the flatness, fixed axis rotation, plane motion, fixed-point rotation, motion and non-inertial dynamics in the flat reference system and rotation reference system; The basic principles and methods of analytical sociology include the principle of virtual function, the principle of Darangbel, the equation of Lagrange, the equation of Hamilton, the Poisson theorist, the principle of Hamilton, the principle of rotation, and so on. Through the study of this course, students get the initial training of theoretical physics to deal with problems and research methods, get the general methods to deal with complex physical problems, and improve students' ability to analyze and solve problems. For the follow-up professional courses to lay a good foundation for learning.