The invention relates to the technical field of nursing instruments, and discloses a nursing medicine feeder for psychiatry department. The nursing medicine feeder comprises a medicine barrel, whereina driving motor is fixedly mounted at the top of the medicine barrel, a rotating rod is fixedly mounted on an output shaft of the driving motor, and stirring plates are fixedly mounted on the outer side of the rotating rod. A piston plate is slidably connected between the left side wall and the right side wall of the medicine barrel, two connecting rods are fixedly mounted at the top of the piston plate, a lower pressing plate is fixedly mounted between the top ends of the two connecting rods, a medicine outlet pipe is fixedly mounted at the bottom of the medicine barrel, and a fixing grooveis formed in the left side wall of the medicine outlet pipe. A bearing is fixedly mounted in the fixing groove, and a fixing rod is fixedly mounted on the inner side of the bearing. According to the nursing medicine feeder for psychiatry department, granular medicines and water can be uniformly mixed, a medicine solution can be heated, a medicine feeding nozzle can be detached, and nursing personnel can conveniently disinfect and clean the medicine feeding nozzle.