Terminal cutting machine is an automatic device that can realize automatic feeding, bending, cutting the middle carry, shearing. It can be easily integrated with other automatic devices to form a whole production line. In this paper, the cam mechanism is used to realize bending and cutting the middle carry, hydraulic drive structure is used to realize terminal feeding and cutting. A reasonable working time sequence among various processes is necessary to ensure the right working order and avoid the interference. The point of the control is to know which processing step it is by using photoelectric sensors to detect several key positions of the cam. The detecting signal is received by the PLC and hence from there to control all processing steps executed in an ordered and cyclic matter. The timing sequence solution introduced in this paper has been successfully implemented in a terminal cutting machine.