Leak detection type gas pressure adjusting valve

The utility model relates to a leak detection type gas pressure adjusting valve, which is composed of a valve seat, a valve core, etc. The utility model is characterized in that one side of a gas passage on the valve core is provided with a ventilating through hole for leak detection; the other position of the valve core is provided with a gas guide hole which is communicated with the gas passage of the valve core; the gas guide hole is connected with a transparent U-shaped gas guide pipe; the position on the valve seat corresponding to the valve core is provided with a perspective cup, the perspective cup is covered on the gas guide pipe, and liquid is filled in the perspective cup; the valve seat is provided with a through hole which is connected with a gas outlet channel of the valve seat and the perspective cup. Compared with the original valve, the utility model has the advantages that the gas leak can be accurately and conveniently found in time; the safety for using the gas can be enhanced; fire, personnel poisoning and casualty, etc. caused by the gas leak can be avoided.