The utility model provides a novel buried gas pipeline connector connecting device. The novel buried gas pipeline connector connecting device comprises a pipeline connecting pipe head, a groove-shapedhoop, a spring, a spring gasket and a Y-shaped rubber sealing ring. The pipeline connecting pipe head comprises a connecting pipe head a and a connecting pipe head b, and flange plates with threads are arranged at the two ends. The device can be in threaded connection with a common pipeline; one end of the spring is connected with the inner side of the hoop, and is annularly arranged in the hoop,so that the advantages of uniform stress and good stability are achieved; when the pipe head moves in a staggered mode, the Y-shaped sealing ring is opened and closed along with the pipe head, gas isalways located outside the Y-shaped sealing ring, gas leakage is avoided, and damage caused by crack expansion of a pipeline is also avoided. The device is simple in structure, low in cost, good in tensile and compression resistance and beneficial to safe and efficient conveying of the gas pipeline.