Human body nail prosthesis cutting device

The invention discloses a human body nail prosthesis cutting device which effectively solves the problem that cutting is inconvenient when a pig nail is made into a human body nail prosthesis. The device comprises a body, a sliding groove is formed at the front side of the body, concave blocks are respectively arranged at the left side and the right side of the body, a sliding rod is detachably connected into a notch of the concave block at the right side, a plurality of shells are detachably connected to the upper end of the sliding rod, positioning sleeves are rotatably connected into the shells through pins, grooves are formed in the positioning sleeves, push plates are connected to the bottom surfaces of the grooves through compression springs, a lower blade is arranged at the front end in the sliding groove, a blade is arranged at the front end of the body, a rotating groove is formed in the body, a cutter replacing disc is arranged at the lower end of the rotating groove, a plurality of T-shaped grooves