The invention discloses an exhaust pipe. The exhaust pipe comprises an air inlet pipe, a buffering pipe and an auxiliary air outlet piece, the air inlet pipe is communicated with the buffering pipe, the inner diameter of the air inlet pipe is smaller than the inner diameter of the buffering pipe, the inner wall, close to the air inlet pipe, of the buffering pipe is provided with an annular steel ball layer, a sleeving hole connected with the auxiliary air outlet pipe in a sleeved mode is formed in the pipe wall, corresponding to the air inlet pipe, of the buffering pipe, the auxiliary air outlet piece comprises a truncated cone-shaped segment and a straight segment which are communicated with each other, the smaller end of the truncated cone-shaped segment is closed, the larger end of the truncated cone-shaped is arranged close to the straight segment, a plurality of through holes used for air flowing are formed in the side wall of the truncated cone-shaped segment, the truncated cone-shaped segment penetrates through the sleeving hole and extends to the buffering pipe, and the connecting position of the truncated cone-shaped segment and the straight segment is welded to the buffering pipe. The exhaust pipe has the function of tail gas pollution reducing.