The invention discloses a welding device. The welding device comprises an induction heater and a welding gun assembly, wherein the induction heater and the welding gun assembly are sequentially arranged on a connecting component in a first direction; a heating end of the induction heater and a welding head of the welding gun assembly are arranged in the same direction relative to the connecting component; and the first direction is a welding joint forming direction. According to the welding device with a function of preheating before welding, welding quality can be effectively controlled on the basis that operation time is effectively shortened; and meanwhile, due to the fact that preheating and welding operations are synchronously carried out, waiting time between the preheating and welding operations is eliminated, so that production efficiency can be effectively improved, and an energy utilization rate is higher. In addition, the induction heater utilizing the electromagnetic induction principle is adopted in the technical scheme, so that splash cannot occur in a heating process, security accidents, such as burn injury, scald injury in an operation process can be eliminated, production safety of operators is guaranteed, and operating environment is greatly improved. On this basis, the invention further provides welding equipment with the welding device.