Rebar hoop bending machine

The utility model provides a rebar hoop bending machine. The rebar hoop bending machine comprises an automatic feeding device, a hoop bending device, a cam device, a straightening mechanism, a traction mechanism and a cutting-off mechanism. The automatic feeding device comprises a feeding rod and a clamping device. The hoop bending device is provided with a workbench, a first air cylinder, a second air cylinder, a rack, a gear, a hoop bending pin and a stop pin. The cam device is provided with cams, cylinder rod air valves, air outflow pipes, a gear motor, a clutch and a cam transmission shaft. The straightening mechanism is provided with two or more rebar adjusting wheel sets, the rebar adjusting wheel sets comprise supports, the supports are provided with two or more rebar adjusting wheels, the rebar adjusting wheels are rotationally arranged on axles, and the axles and the supports are longitudinally connected in a sliding mode. The supports are in threaded connection with adjusting bolts for ejecting the axles, and V-shaped wire grooves are formed in the rebar adjusting wheels. The traction mechanism comprises an upper traction device and a lower traction device, and rebars are fixedly arranged between the upper traction device and the lower traction device. The rebar hoop bending machine can achieve the automatic feeding function, the automatic bending function and rebar traction mechanization, and is high in automation degree.