The invention discloses a manufacturing device and a method for a bimetal composite hot bend. The device comprises a thermal induction bend mechanism, an inert gas protecting system and an automatic control system, wherein the thermal induction bend mechanism comprises a rack, a hydraulic cylinder and a hydraulic control system, a rolling wheel, a heating inductor, a limiting stopper, a rotating clamp and a first cooler are arranged on the rack, the inert gas protecting system comprises a gas inlet end socket, an exhausting end socket and a gas circulating pipeline, and a gas inlet end valve, an exhausting end valve, a gas concentration tester, a gas motor and a second cooler are mounted on the gas circulating pipeline. The method includes the steps of intercepting a required bimetal composite pipe, sealing the bimetal composite pipe, installing the bimetal composite pipe on the thermal induction bend mechanism, connecting the inert gas protecting system and roasting and bending. The manufacturing device and the method for the bimetal composite hot bend are reasonable in design, high in intelligent degree, applicability, rate of finished products, product qualities and practicability, and convenient to popularize and apply.