Deep hole gas phase fracturing pipe multi-stage connection apparatus

The utility model discloses a deep hole gas phase fracturing pipe multi-stage connection apparatus comprising two and more gas phase fracturing pipes, a connection buffer, a hole sealing device, a push rod and a fixing device. The plurality of fracturing pipes are connected together via the connection buffer; the hole sealing device is divided into one to three segments; the fracturing pipe on the front end is connected with the tail end of the hole sealing device; the front end of the hole sealing device is connected with the push rod; the push rod is connected with the fixing device; and a pressure detector is disposed in the hole sealing device. Various fracturing pipes can be fractured under different geological coal layers, so the deep hole gas phase fracturing pipe multi-stage connection apparatus possesses strong practicality; and pressure in the drilling hole can be monitored.