The invention relates to an indirect connecting method between a throttle valve and a pressure gauge, which is characterized by adopting two special parts: 1. a hexagonal fastening bolt with an internal thread and an external thread, wherein the internal thread and the external thread are coaxial and have opposite spiral directions, the external thread of the hexagonal fastening bolt is matched with the internal thread of a valve body of the throttle valve, and the internal thread of the hexagonal fastening bolt is matched with the external thread of a pedestal of the pressure gauge; 2. an annular pressure ring, wherein the pressure ring is rigid and annular, sections are longitudinally symmetrical, and the annular pressure ring is in the shape of an annular double-cone body and is placed between the bottom plane in a screw hole of the valve body and the bottom plane of the pedestal of the pressure gauge. The invention has the advantages that on the basis that the two special parts have each specific structural shape and function and a mutual procuring action, the indirect connecting method can obtain a remarkable effect, and the two special parts, i.e. the hexagonal fastening bolt and the pressure ring exert each function (fastening and sealing) when in fixing and fastening to realize a pulsation resisting type stainless steel pressure gauge with reliable fixing, good sealing performance, adjustable position of a screw rotary adjusting shaft and convenient operation.