The utility model discloses coal-fired heating equipment with a tail-gas purification device. The coal-fired heating equipment with the tail-gas purification device comprises a tank body, a drain outlet is formed in the bottom of the tank body, three support feet are arranged on the periphery of the lower portion of the tank body, a smoke outlet pipe, a smoke inlet pipe and a spraying pump are arranged on the upper face of the tank body, an induced draft fan is arranged in the middle of the smoke outlet pipe, the smoke inlet pipe is communicated with a smoke outlet of the heating equipment, the spraying pump is provided with a spraying pipe, the spraying pipe is communicated with the smoke inlet pipe, and a chemical reagent filling port is formed in one side of the tank body. The coal-fired heating equipment with the tail-gas purification device has the advantages that the structure is simple, the operation is convenient, chemical reagents are used for being sprayed through the spraying pump, the good purification effect and the small environmental pollution are achieved for the coal-fired furnace tail-gas purification treatment, and the coal-fired heating equipment with the tail-gas purification device is suitable for the coal-fired furnace tail-gas purification treatment of coal-fired furnaces of factories and homes.