Portable coal gas crushing desorption amount measuring device

A portable coal gas crushing desorption amount measuring device comprises a water container, a water pipe, a measuring cylinder, a horizontal tripod, a gas pipe and a crushing desorption mechanism, and the horizontal tripod is used for adjusting the levelness of the measuring cylinder; the measuring cylinder is provided with a water containing cavity, a water injection port communicated with the water containing cavity, a gas inlet and a water drainage port, water is injected into the water containing cavity through the water injection port, the gas inlet is connected with the smashing desorption mechanism through a gas pipe, the smashing desorption mechanism smashes a coal sample to release gas, and the gas is conveyed to the water containing cavity through the gas pipe. When the gas is introduced into the water containing cavity, water with the same volume discharged is discharged to the water containing container through the water pipe; a top pressure sensor and a bottom pressure sensor are arranged at the