Rear-wheel brake device of frog type scooter

The utility model relates to a rear-wheel brake device of a frog type scooter. The rear-wheel brake device of the frog type scooter comprises a rear wheel, a rear fork, a brake pad and a brake rubber block arranged on the brake pad, wherein the rear fork is inserted in the center position of the rear wheel in a connected mode and is movably connected with the center of the rear wheel through a rotary shaft, the brake pad is fixed to the inner side of the rear wheel through a bolt and a nut in the mode that the bolt penetrates through a threaded hole of the brake pad, the brake pad can vertically move by using the bolt as a supporting point, a groove is formed in the lower surface of the rear end of the brake pad, the brake rubber block is arranged in the groove, a protrusion connected with the groove in a clamped mode is arranged on the front side of the brake rubber block, and the back side of the brake rubber block is arranged to be in the shape of an arc. Compared with the prior art, the rear-wheel brake d