The invention discloses a quick sterilizing device for an easy-to-install medical beauty instrument, which belongs to the technical field of medical beauty, and includes a casing, a driven gear, a driving gear, a moving sliding sleeve, a cleaning brush, a UV sterilizing lamp tube, a positioning component and a fixed clamp plate, the top of the casing is fixedly installed with a drive motor; the present invention installs a driveable and rotatable middle drum inside, and a UV sterilizing lamp tube is installed outside the middle drum. , can directly drive the rotation of the middle drum, so that the UV germicidal lamp can rotate in real time and improve the sterilization effect. At the same time, a driving gear is installed outside the middle installation shaft of the middle drum. The driving screw of the moving gear rotates, thereby driving the moving sliding sleeve to lift, and driving the cleaning brush to clean the instrument, realizing the purpose of cleaning while sterilizing the beauty instrument, with powerful functions.