Combined with the common internal combustion engine crank dynamics model

the analysis system of crank and connecting rod mechanism is designed by using graphical user interface（GUI）development tool of MATLAB.The dynamics analysis of the crank and connecting rod mechanism under different operating conditions with different crank-angle and the results with visualization expression are performed by the system.It for The application program of the system is compiled by using the compiler in MATLAB

and a reliable basis for the selection and design of the internal combustion engine mechanism conveniently and intuitively is provided.