A novel boiler for biomass briquette combustion comprises a boiler body and a hearth located in the boiler body. A feeding port and a slag removal port are formed in the boiler body, and a dust remover and an induced draft fan are arranged in the boiler body, wherein the dust remover is communicated with the hearth, and the induced draft fan is communicated with the dust remover. After the dust remover and the induced draft fan are connected through a flue, the flue stretches out of the boiler body from the upper end of the boiler body. A water-bearing layer composed of a water pipe is arranged in the boiler body, one end of the water pipe serves as a water inlet formed in the boiler body, and the other end of the water pipe serves as a water outlet formed in the furnace body. On the premise that cost is not increased, heat efficiency is improved and the good energy saving and emission reduction effects are achieved only by changing the connecting relation between the parts.