Brake device and fitness bicycle

The invention belongs to the technical field of fitness equipment, and discloses a brake device and a fitness bicycle. The brake device comprises a frame, wherein a driving mechanism and a brake mechanism are arranged on the frame; the driving mechanism comprises a handle, a rotary base and a rope; the rotary base is connected to one end of each of the handle and the rope respectively; the brake mechanism comprises a flywheel and a brake assembly; both the flywheel and the brake assembly are rotationally arranged on the frame; the brake assembly is connected to the other end of the rope; the handle is configured to drive the rotary base to rotate relative to the frame; and the brake assembly is driven to rotate relative to the frame through the movement of the rope, so that the brake assembly can be pressed against the flywheel. According to the brake device, the driving mechanism and the brake mechanism cooperate with each other, the handle is linked with the rotary base and the ropein the braking or pressur