Jaw driving device for surgical instrument and surgical instrument

The utility model discloses a jaw driving device for a surgical instrument and the surgical instrument. The jaw driving device comprises a steering piece, a driving rod and a driving assembly. The far end of the steering part is connected with the jaw assembly, and the near end of the steering part is provided with a first abutting face and a second abutting face. The driving rod comprises a first driving rod and a second driving rod; the driving assembly is connected with the first driving rod and the second driving rod so as to drive the first driving rod and the second driving rod to move front and back. The first driving rod is matched with the first abutting face in an abutting mode to push the steering part to rotate in the anticlockwise direction when moving forwards, and the second driving rod is matched with the second abutting face in an abutting mode to push the steering part to rotate in the clockwise direction when moving forwards. The jaw driving device solves the problems that an existing jaw d