The invention discloses a boiler capable of utilizing copper smelting waste radiation heat. The boiler comprises a steel frame which is composed of stand columns and a platform. A climbing ladder is connected to the lower portion of the platform. The two sides of the platform are each provided with a guardrail. A steam manifold is arranged on the platform, and a water outlet of the steam manifold is connected with a descending pipe. A lower collection tank is connected to the end, away from the steam manifold, of the descending pipe. A membrane evaporating pipe and an evaporating pipe are connected to the side, away from the descending pipe, of the lower collection tank. The evaporating pipe is located below the membrane evaporating pipe. A disc casting machine is arranged below the evaporating pipe. The membrane evaporating pipe and the evaporating pipe are both connected with an upper collection tank. An ascending pipe is connected to the top of the upper collection tank and connected with the outer wall of the steam manifold. The boiler is small in occupied space, neither affects existing equipment nor needs to be modified. Through the design, the temperature of the working environment can be reduced, the production cost is reduced, energy is saved for China, and environmental protection is achieved.