The invention discloses a cutting-up type crayfish shell stripping cutter. The cutting-up type crayfish shell stripping cutter is characterized by comprising a skewer provided with a handle and a sliding knife connected with the handle or the skewer by a connecting piece; the handle is provided with a support arm extending towards one side; the support arm is connected with two parallel cantilevers extending forwards, a gap is reserved between the two cantilevers, and a cutting edge of the sliding knife can pass through the gap; longitudinal slide ways are respectively arranged on the outer side faces of the two cantilevers, and penetrate through the two ends of the cantilevers; a press board is arranged at the back of the sliding knife; connecting blocks which are respectively positioned at the two sides of the cantilevers are connected with one end, along the direction of the cutting edge, of the press board; each connecting block is provided with a bulge which is coincided with the interior of the corresponding longitudinal slide way at the same side. When eating a crayfish, a person inserts the skewer into the crayfish so as to enable the crayfish to be gradually unfolded to be straight in the inserting process, and then cuts the shell of the crayfish by using the sliding knife so as to enable the crayfish to be neatly split; after the crayfish is split, the meat of the crayfish is regular and ordered, thus being eaten elegantly.