The utility model provides an electric coal drill wet type hole water inlet valve. A main shaft is connected with two ends of a water inlet sleeve via a bearing sleeve and a bearing. The inner side of the bearing sleeve is provided with two pistons. A sealing ring and a sealing compensator are arranged among the main shaft, the bearing sleeve and the pistons. Two ends of the water inlet valve are connected with end caps. The right end of the main shaft is connected with a helical casing, and the helical casing is connected with a drill rod. The side wall of the water inlet sleeve is provided with a water inlet and a quick joint. The water inlet is communicated with the side holes of the pistons and the central through hole of the main shaft. When the utility model works, water can enter the through hole of the main shaft to the drill rod from the water inlet via the side holes of the pistons for drilling in wet type. The electric coal drill wet type hole water inlet valve can be matched with various electric coal drills, and the electric coal drill wet type hole water inlet valve has the advantages of simple structure, favorable sealing performance, convenient operation, high safety, long service life, etc.