Cutting assistant device and cutting device

The invention relates to the technical field of cutting, in particular to a cutting assistant device and a cutting device. The cutting assistant device is used for clamping a to-be-cut part and comprises a frame, a shifting mechanism, a first clamping wheel and a second clamping wheel; the first clamping wheel is arranged on the frame through the shifting mechanism; the second clamping wheel is installed on the frame; and the first clamping wheel is moved through the shifting mechanism so that the to-be-cut part can be clamped in a clamping space formed by the first clamping wheel, the secondclamping wheel and the frame, and the frame can rotate relative to the to-be-cut part. According to the cutting assistant device, the to-be-cut part is clamped by the first clamping wheel, the secondclamping wheel and the frame, then the frame can rotate relative to the to-be-cut part, the requirement for guaranteeing fixation of the to-be-cut part without looseness during rotary cutting of cutting equipment is met, and t