The invention discloses a vehicle-mounted garbage can, and relates to the field of environmental protection equipment. The vehicle-mounted garbage can comprises a can body, a can cover, an air inlet assembly, a rotating shaft assembly, a crushing mechanism and a collecting box. According to the vehicle-mounted garbage can, a common garbage collection and storage capacity is achieved, and in the running process of the automobile, a vehicle window is opened, so that the vehicle-mounted garbage can can drive a fan assembly to rotate by means of wind power generated in the running process of the automobile, and the rotating shaft assembly, a stirring assembly and a crushing mechanism are driven to rotate synchronously; on one hand, garbage in the can body is crushed, the space utilization rateof the can body is increased, and on the other hand, active carbon particles in a deodorization chamber can be stirred so that unpleasant odors in the can body can be fully absorbed by the active carbon particles; and in addition, the rotating shaft assembly does not need to be manually driven to rotate, so that the energy is saved, and the labor is saved.