The invention discloses a snakelike robot kinetic analysis method based on a spinor theory and a Kane method. The method combines with the spinor theory and the Kane method, and defines an active force spinor, an inertia force spinor, a partial velocity spinor, a generalized active force, and a generalized inertia force and other parameters, and according to experimental observation of the snakelike robot, related parameters corresponding to the snakelike robot are solved, and a kinetic model is established, so as to give out a kinetic analysis method of the snakelike robot. Specific steps comprise: combined with the spinor theory, defining a Kane equation, measuring and approximating each joint quality, length, and undersurface radius of the snakelike robot, and according to experimentalobservation and theoretical equations, deriving each quantity required by the Kane equation, and establishing a Kane kinetic equation. The method combines the spinor theory and the Kane method, and effectively improves calculation speed and calculation efficiency, and the kinetic model of the snakelike robot is improved, and the model is concise and beautiful.