The invention belongs to the technical field of energy utilization and discloses a regenerative cycle device for an air conditioner. The regenerative cycle device for the air conditioner is used for circulating cooling of cooling fins of the air conditioner. The regenerative cycle device for the air conditioner comprises a box. A condensate water recovery hole is formed in the top end of the box and used for collecting condensate water generated during operation of the air conditioner into the box. Flow guiding holes are formed in the bottom of the box. The condensate water in the box flows towards the cooling fins of the air conditioner from the flow guiding holes. A flow guiding structure is arranged in the box and connected with the condensate water recovery hole, so that the flowing speed of the condensate water is lowered, and the flow of the flow guiding holes is evenly distributed. By the adoption of the regenerative cycle device for the air conditioner, power consumption of the air conditioner is reduced, and the refrigerating efficiency is improved.