Handheld drug delivery device for anorectal department

Disclosed is a handheld drug delivery device for an anorectal department. The device comprises a drug storage cylinder and a push-pull rod, a piston plate is fixedly installed at the top of the push-pull rod and can slide in an airtight reciprocating mode along the inner side wall of the drug storage cylinder, a drug delivery pipe is connected to the top of the drug storage cylinder in a threaded mode, and a drug delivery head is integrally formed at the top of the drug delivery pipe; the cross section of the drug delivery head is of a trapezoidal structure, the lower end of the drug delivery head is in threaded connection with a lubricating guide mechanism, symmetrically-distributed finger rings are integrally formed on the outer side wall of the drug storage cylinder, and a locking mechanism is fixedly installed in each finger ring; a pushing mechanism used for driving the push-pull rod to move stably at a constant speed is fixedly installed on the drug storage cylinder. The device can effectively prevent s