Park entrance guard security device with adjustable pitching angle

The utility model relates to the technical field of security entrance guard, and discloses a park entrance guard security device with an adjustable pitch angle, which comprises a protective shell, a first motor is fixedly connected to the inner wall of the front end of the lower end of the protective shell, and a protective box is arranged on the right side of the protective shell. The output end of the first motor is fixedly connected with a first rotating column, the first rotating column is rotationally connected with the protective shell, the outer wall of the first rotating column is fixedly connected with a first driving belt wheel, a first driven belt wheel is arranged at the upper end of the first driving belt wheel, and a cleaning assembly is arranged on the outer wall of the right side of the protective shell; sliding grooves are formed in the inner walls of the front end and the rear end of the protection shell in a penetrating mode. The protection box is moved through the first belt, the transpare