Gas flow accurate control assembly of natural gas internal combustion generator

The invention relates to the field of flow control of internal combustion engines, in particular to a gas flow accurate control assembly of a natural gas internal combustion engine generator, which comprises a venturi tube, an outer barrel plug rod and a synchronous radial adjusting piece, the venturi tube is provided with a narrow tube section and a wide tube section, and through holes are formed in the narrow tube section along the circumferential direction; the inner circumference of the outer cylinder and the outer circumference of the narrow pipe section form a gas cavity, a gas inlet is formed in the outer cylinder, the plug rod is arranged in the gas cavity in the circumferential direction of the Venturi pipe, the plug rod and the through hole are coaxial, the plug rod is provided with a conical end facing the narrow pipe section, the synchronous radial adjusting piece is arranged outside the Venturi pipe, and the synchronous radial adjusting piece is provided with an execution part circumferentially a