Disposable anorectal cutting anastomat

The invention relates to a disposable anorectal cutting anastomat, pertaining to a medical instrument especially adapted to cutting and anastomosis of anorectal hemorrhoids.The disposable anorectal cutting anastomat comprises a nail-abutting seat assembly, a needle bin assembly, a snap ring assembly, a locking ring, a straight push rod, a straight push rod spring, a safety device, a movable handle assembly, a fixed handle assembly, an adjusting screw rod and an adjusting nut assembly. The nail-abutting seat assembly comprises a nail-abutting seat, a backup cutter ring and a connecting shaft. The needle bin assembly comprises a needle bin protection cover, a needle bin, a sewing nail, a cutter, a nail-pushing piece and a nail bin sleeve. The snap ring assembly comprises a snap ring pipe and two snap spring pieces. The adjusting screw rod adopts a variable-pitch screw rod having two ends which are fine-pitch screw rods. The front end portion of the adjusting screw rod is provided with a screw rod connecting hole. An indication assembly comprises an indication window, an indication pointer, an indication pointer driving rod and an indication pointer torsion spring. The safety device comprises a safety block, a safety block spring, a safety driving rod and a safety driving rod tension spring. The adjusting nut assembly comprises an adjusting nut, a screw rod micro-adjusting nut, a sealing cap, a nut pin and a nut pin retainer ring.