The invention discloses a numerical control driving device of a crank-connecting rod-toggle rod plate shearing machine. The numerical control driving device of the crank-connecting rod-toggle rod plate shearing machine comprises a numerical control system, a motor, a transmission mechanism connected with the motor, a force increasing mechanism connected with the transmission mechanism, a sliding block connected with the force increasing mechanism and a movable knife rest. The numerical control driving device of the crank-connecting rod-toggle rod plate shearing machine is characterized in that the transmission mechanism comprises a crank connecting rod mechanism, the force increasing mechanism comprises a toggle rod mechanism, the sliding block is arranged in the sliding groove and fixedly arranged on the movable knife rest, one end of the toggle rod is connected with a machine body, and other end of the toggle rod is connected with the sliding block. A crank of the crank connecting rod mechanism is connected with a rotor of the motor, and a connecting rod of the crank connecting rod mechanism is connected with the middle of the toggle rod mechanism. The numerical control driving device of the crank-connecting rod-toggle rod plate shearing machine can improve shearing force and automatic control level of the mechanical plate shearing machine, simultaneously omits an oriented guide rail of the movable knife rest of the mechanical plate shearing machine, simplifies structure, and improves shearing width and accuracy of the plate shearing machine and working efficiency.