Jaw opening angle mechanism for endoscope cutting anastomat

The invention relates to a jaw opening angle mechanism for an endoscope cutting anastomat. The tail end of a movable jaw is rotationally connected with a fixed jaw around a pivot, so that the movablejaw has a closed working position and an open working position; a push broach is arranged in a sliding manner relative to the fixed jaw along the length direction of the fixed jaw; the tail end of themovable jaw is provided with a stress part, an abutting part corresponding to the stress part is arranged on the push broach, and the abutting part is located on the front side of the stress part; and a connecting line of the stress part and the pivot is intersected with a sliding track of the abutting part or the extending line of the stress part and the pivot is intersected with the sliding track of the abutting part, the abutting part abuts against the stress part, the stress part and the abutting part are in rigid contact, the movable jaw can be well limited and supported, the opening angle of the movable jaw is r