Fiber chopping knife roller capable of stepless regulating of knife cutting angle

The utility model discloses a fiber chopping knife roller capable of stepless regulating of a knife cutting angle. The knife roller comprises an I-shaped knife roller, two angle scales with the same structure, two positioning discs with the same structure and a stepped shaft; and the I-shaped knife roller is assembled in the middle of the stepped shaft and fixedly connected with the stepped shaft, and the angle scales, the positioning discs, a sleeve and a bearing are sequentially assembled on the stepped shaft outside the two ends of the I-shaped knife roller along an outward direction. A cutting angle of a knife can be regulated in a stepless manner through a design of the angle scales and a rotary knife slot, and after equipment is well installed, the cutting angles (an angle scope is between 0 degree and 30 degrees) of all the long blades can be regulated at one time through rotating the angle scales and enabled to be the same, so that a problem that the cutting angle of the current chopping equipment can