Ostomy chassis opening cutting device

The utility model discloses a stoma base plate opening cutting device which comprises a lower fixing table, a cutting bearing table arranged on the surface of the lower fixing table and concentrically distributed with the lower fixing table, an upper fixing piece movably connected with the lower fixing table and a cutting mechanism connected and distributed above the cutting bearing table through a connecting supporting rod and capable of rotating around the axis of the cutting mechanism. A passing cavity is formed in the upper fixing piece, and the cutting bearing platform is contained in the passing cavity; the cutting mechanism comprises a reference rod, a branch rod in shaft connection with the reference rod, a locking piece used for locking the movable branch rod, a locking bolt which is in threaded connection with the branch rod and can lock the locking piece, and a cutting knife which is connected to the branch rod and can make contact with the cutting bearing platform. The axis of the reference rod an