All-in-one heating boiler is a new product developed by our company  including common type and vehicle-borne type. As a DC special industrial boiler, it uses coal, oil or gas as fuel, uses heat transfer oil as the heat medium, uses heat transfer oil circulating pump to force fluid phase to circulate, then transfers thermal energy to heat-consumption equipment, afterwards it returns to heat oil boiler for reheating. The product has multiple features, such as obtaining high working temperature, keeping working temperature stable under a low pressure condition, perfect running control and safe testing device, has already used for multiple industries, and a considerable social and economic benefit is obtained.