Lift type fan

The utility model relates to a lift type fan. The lift type fan comprises an outer cover, a shell body and a base, wherein a motor is arranged in the shell body, a sliding block is arranged on the rear side end of the shell body, a sliding groove is formed in the base in the vertical direction, the sliding block is arranged in the sliding groove, a threaded rod penetrates through the base, the threaded rod penetrates through the sliding block and is in threaded fit with the sliding block, the upper end of the threaded rod and the lower end of the threaded rod extend outside the base, the upper end of the threaded rod and the lower end of the threaded rod are provided with limit pieces, a steel ball is arranged between the side wall of the sliding block and the inner wall of the sliding groove, a position cavity is formed in the inner wall of the sliding block, part of the steel ball is arranged in the position cavity, and a compression spring is arranged between the steel ball and the bottom of the position cavity. According to the technical scheme, provided is the lift type fan, abrasion between the sliding block and the sliding groove is small, and therefore when the lift type fan is in use, vibration is small, and noise is low.