Control system of normal sewing machine

The invention provides a control system of a normal sewing machine, belongs to the technical field of machinery and solves the problems of inconvenience in connection and difficulty in mounting in the existing normal sewing machine servo control system. The control system comprises a shell with one end connected to a machine head of the normal sewing machine, one end, connected with the machine head of the normal sewing machine, of the shell is open, the inside of the shell is a cavity which comprises an upper cavity body and a lower cavity body, a servo motor is arranged in the upper cavity body, a control circuit board is arranged in the lower cavity body, the open end of the shell is connected with an aluminum heat dissipation plate which closes the lower cavity body, the control circuit board is fixed to the inner side face of the aluminum heat dissipation plate, the lateral portion of the aluminum heat dissipation plate is provided with a notch, a convex guide bar is arranged on the inner side wall of the lower cavity body of the shell correspondingly and located in the notch, the edge of the open end of the shell is provided with an insertion slot, and an insertion portion is arranged on the aluminum heat dissipation plate protrudingly and inserted into the insertion slot. The control system has the advantages of convenience in connection, compact structure, high practicality and the like.