Drilling hole sealing device in highly gassy mine

The utility model relates to a hole sealing device in a coal mine, in particular to a drilling hole sealing device in a highly gassy mine, and solves the problem that the phenomena of drilling hole blockage and spraying as well as gas transfinite come out easily when a traditional drilling hole sealing device is used in highly gassy mine lots. The drilling hole sealing device in the highly gassy mine comprises a hole sealing pipe; the pipe orifice of the hole sealing pipe is connected with one end of a reducing-diameter three-way valve; another end and the third end of the reducing-diameter three-way valve are respectively connected with a water drainage box and two constant-diameter four-way valves which are connected in series through one of the two ends; the water drainage box and a gas-water separator are respectively connected to the rest two ends of the constant-diameter four-way valve in the middle; and a gas pipeline and a plug are respectively connected to the rest two ends of the constant-diameter four-way valve at the outer end. The utility model avoids the phenomena of drilling hole blockage and spraying, prevents gas from outgushing to cause gas transfinite, and well solves the gas-water separation problem at the same time, thereby ensure that no water is left in gas pipelines.