High-performance automatic zoom lens based on plane cam

The utility model relates to the technical field of lenses, and discloses a high-performance automatic zoom lens based on a plane cam, which comprises a lens body, a protective assembly arranged on the outer surface of the lens body, a rotating assembly arranged below the lens body, an adjusting assembly arranged above the rotating assembly and positioned below the lens body, and a lens assembly arranged below the adjusting assembly. The protection assembly comprises a sleeve part fixedly installed on the outer surface of the lens body, a sleeve is slidably installed on the outer surface of the sleeve part, a groove is formed in the top of the sleeve part, and a threaded rod with one end penetrating through and extending to the left side wall of an inner cavity of the groove is movably installed on the right side of the sleeve part and rotationally installed. And the outer surface of the threaded rod is in threaded connection with a moving part of which one end penetrates through and extends to be fixedly mou