Geological survey wireline coring drilled coal-bed gas pressure meter

The utility model relates to a geological survey wireline coring drilled coal-bed gas pressure meter at least comprising a fishing hanging mechanism, a packing mechanism, a relief mechanism and a pressure measuring mechanism. The fishing hanging mechanism is composed of a spearhead, a spring, a ball cover, a sliding base, a spring cotter, a clip chamber, a clip rack, a clip grip, a clip holder, a hanging connector, a central support tube and a connector; the upper end of the spearhead is provided with a connecting structure fitting a wireline fisher. The packing mechanism is composed of an end connector, a telescopic connector, an upper centralizing ring, a packing rubber tube, a middle centralizing ring, a central tube, a lower centralizing ring, a sliding connector, a sliding piston sleeve and an expansion protective pin. The relief mechanism is composed of a connecting push shaft, a sliding shear pin, a sliding shaft, a push bar, a sliding sealed cavity, a hanging pin, a sliding end cover, a sealing sub, a sealing piston, a sealed cavity and a sealed cavity end cover; the sealing sub is provided with a through hole; the sealing piston is provided with a through hole. The pressure measuring mechanism is an electronic downhole pressure gauge.