The invention discloses a humidifying device of air conditioning equipment. The humidifying device of the air conditioning equipment comprises a water tank, an air outlet assembly is arranged on the water tank, a draught fan and a filtering assembly are arranged on the side face of the water tank, a descaling assembly is arranged in the water tank, the air outlet assembly comprises a first circular ring and a second circular ring, the first circular ring is fixed to the water tank, the second circular ring is rotationally connected with the water tank, the inner wall of the first circular ring is provided with teeth, the second circular ring is fixedly provided with a first motor, the rotating shaft end of the first motor is provided with a gear ring, the gear ring is meshed with the teeth, the inner wall of the second circular ring is provided with an exhaust pipe, the exhaust pipe penetrates through the water tank, the exhaust pipe is provided with limiting pins, the two sides of the exhaust pipe are provided with sliding grooves, the inner walls of the sliding grooves are slidably connected with connecting rods, the connecting rods are rotationally connected with air guide pieces, strip-shaped grooves are formed in the air guide pieces, the limiting pins are slidably connected with the strip-shaped grooves, one ends of the connecting rods are rotationally connected with a rotating rod, and one end of the rotating rod is rotationally connected with a gear ring. By arranging the air outlet assembly, the humidification range is expanded, rapid indoor humidification is facilitated, by arranging the descaling assembly, water scale is reduced, and meanwhile water scale cleaning is facilitated.