A connecting pipe for air conditioner refrigeration pipes comprises a connecting pipe main body. The connecting pipe main body comprises a first connecting pipe body, a second connecting pipe body and a third connecting pipe body, wherein the second connecting pipe body is a hollow circular truncated cone; the inner diameter of the first connecting pipe body is smaller than that of the third connecting pipe body; the first connecting pipe body and the third connecting pipe body are cylinders; the first connecting pipe body, the second connecting pipe body and the third connecting pipe body are integrally manufactured; and the outer ring of the third connecting pipe body is provided with a throat. Compared with the prior art, the connecting pipe for the air conditioner refrigeration pipes is provided with the three connecting pipe bodies, the connecting position of the adjacently connected refrigeration pipes is located in the second connecting pipe body, and the leaking condition of the connecting position is lowered to the maximum extent. In addition, the outer ring of the third connecting pipe body is provided with the throat, better linkage between the connecting pipe and the refrigeration pipes is guaranteed, the product quality is improved, and meanwhile assembling work of refrigeration equipment is facilitated.