Abstract: A watertight and dustproof power cable gland comprises an annular base having a hole at the center thereof and having a groove along the sidewall thereof, wherein the groove has a protrusion member on the bottom thereof; a curved pipe interconnecting with the hole, wherein inner walls of the hole and curved pipe jointly form an inclined surface; and at least one fixing ring arranged on an external surface of the curved pipe. The watertight and dustproof power cable gland is installed on a separation board, and the protrusion member tightly contacts the separation board. A power cable passes the annular base and the curved pipe and is bound up with the opening of the curved pipe by a fixing strap. The present invention prevents liquid, dust and insects from entering an electric device via the cable gland and makes the cable gland less likely to drop out.