Beautifying knife head assembly convenient to replace

The utility model relates to the technical field of medical instruments, in particular to a cosmetic knife head assembly convenient to replace, which comprises a knife handle, a connector, a fixing assembly and a blade, the connector is fixedly arranged on one side of the knife handle, and the fixing assembly comprises a connecting cover, an inserting mechanism and a fixing mechanism. The connector is connected with the connecting cover through an inserting mechanism and fixed through a fixing mechanism, the inserting mechanism comprises an inserting block fixedly arranged on one side of the connector, and a limiting column matched with the limiting groove is fixedly arranged on the connecting cover. A connector, a connecting cover and a blade on the connecting cover are detachably connected through an inserting mechanism and a fixing mechanism, the angle of the connecting cover and the angle of the blade are prevented from being changed through cooperation of an inserting block and the connecting cover, and