Heterogeneous metal inertia friction welding preheating equipment and using method

The invention provides heterogeneous metal inertia friction welding preheating equipment and a using method. The heterogeneous metal inertia friction welding preheating equipment is composed of a heating tower and a main machine. Wherein the heating tower comprises an inductor, an inductor contraction device, an infrared inductive probe and an electromagnetic fixing seat; the host comprises an induction power supply, a display panel and a controller. The method comprises the following operation steps: step A, fixing a heating tower; b, the heating frequency and the end face expected temperature are set, and the end face of the weldment is heated; and C, temperature monitoring is conducted, when the expected temperature of the end face is reached, an inductor contraction device is started, and friction welding is conducted on the two weldments. The device has the characteristics that firstly, induction preheating and temperature control can be carried out on two weldments made of different metal materials befo