Parking brake structure of riding type mower

The utility model relates to a parking brake structure of a riding type mower, which comprises a rack and a brake pedal assembly, and the brake pedal assembly comprises a rotating arm and a pedal; the rotating arm is hinged to the rack, and the rotating arm is connected with the brake mechanism; the rotating arm is further connected with a parking mechanism. The parking mechanism is connected to the driving section of the rotating arm and is in a parking or unlocking state along with rotation of the rotating arm; after the rotating arm drives the brake mechanism to brake, the rotating arm continues to rotate to a limit position, and the parking mechanism enters a parking rotating state; a return mechanism is further arranged on the rotating arm, after the parking mechanism enters the parking rotating state, force is applied to the pedal to enable the rotating arm to rotate to the limiting position again, then force application is stopped, and under the action of the return mechanism, the rotating arm resets t