The elastic forces of certain shrapnels vary widely in their production process, and the size of stretch will seriously affect the performance of the system directly. In order to improve the performance of system, it is very essential to sort the different shrapnel based on their elastic force.The automatic sorting control system was put forward based on PLC and GOT, the system could be used to sort the shrapnel according to the size of their elastic forces. The I/O distribution diagram and control flow chart were designed, the design principles and control methods were elaborated. This way has been taken good effect in practice.