Bevel-edge cutting knife of shield machine

The invention belongs to cutting knife equipment of a shield machine and in particular relates to a bevel-edge cutting knife of the shield machine arranged on a shield knife disk. The bevel-edge cutting knife of the shield machine is characterized in that: an inclined angle between a straight line of the cutting knife edge of an ith bevel-edge cutting knife and a vertical line of the cutting knife edge from the nearest point of the cutting knife edge to the farthest point of the cutting knife edge is as follows: thetai=arctan(omega Di/2v), wherein the nearest point of the cutting knife edge is a point on the cutting knife edge, which is closest to a rotary center of the knife disk; the farthest point of the cutting knife edge is a point on the cutting knife edge, which is farthest from the rotary center of the knife disk; the omega is the rotary speed of the knife disk; the Di is the track circle diameter of a knife edge midpoint of the ith bevel-edge cutting knife which rotates with the knife disk; and the v