The invention discloses a hair drier with a rotating mechanism. The hair drier comprises a handle and a shell arranged at the top of the handle, and is characterized in that the rotating mechanism capable of changing the blowing direction is arranged in the head end of the shell, a blowing mechanism capable of enabling the blowing function of the hair drier is arranged in the tail end of the shell, and a control mechanism capable of controlling the rotating mechanism to rotate is arranged between the blowing mechanism and the rotating mechanism. The hair drier is simple in structure and convenient to use; by arranging a motor to drive a worm to rotate and using the control mechanism to control the cooperation among the worm, a worm gear and a bevel gear, the rotating mechanism can be driven to rotate, and therefore a manual rotation mode is supplanted by the mode of using the rotating mechanism to change the air outlet direction, more convenience is provided for people who use the hairdrier for a long time, and therefore people's demands are met.