The invention discloses an extension rod smoke gun which comprises a sampling head, an extension rod, an extension rod sealing connection assembly, a sampling assembly and a smoke gun handle, wherein the sampling head is arranged at one end of the extension rod smoke gun and is connected with the sampling assembly; one end of the sampling assembly is connected with the extension rod sealing connection assembly; the other end of the sampling assembly is communicated with the sampling head; the smoke gun handle is arranged at the other end of the extension rod smoke gun. The extension rod smoke gun is characterized in that the extension rod sealing connection assembly comprises a protecting pipe, a smoke dust pipe, a concave plug, a connecting nut and a convex nut; the protecting pipe is arranged on the outermost side of the extension rod sealing connection assembly; the smoke dust pipe is adjacent to the inner side of the protecting pipe; the concave plug and the convex plug are respectively arranged at two parts of the extension rod sealing connection assembly; a spring contact and a static contact are respectively arranged at the concave plug side and the convex plug side. The extension rod smoke gun disclosed by the invention has the benefits that sampling extension rods matched with the extension rod smoke gun can be selected according to different sampling conditions; after the extension rod smoke gun is detached, the whole length is short, so the extension rod smoke gun is convenient for carrying; besides, the sealing property of the connected part is good.