The invention provides a domestic boiler exhaust emission pipe with a purifying function. The domestic boiler exhaust emission pipe comprises a pipe body, wherein an exhaust inlet pipe is arranged on the left side of the pipe body; a cooling pipe is arranged on the right side of the exhaust inlet pipe; a purifying pipe is arranged on the left side of the cooling pipe; the right side of the purifying pipe is connected with the bottom end of a filtering pipe; and an emission port is arranged at the top end of the filtering pipe. The domestic boiler exhaust emission pipe provided by the invention adopts the multi-sectional pipe design, is convenient to dismount and clean, has the cooling, purifying and filtering functions, can be used for effectively purifying boiler exhaust and effectively protecting the air from pollution caused by direct exhaust emission, and is low in use cost.