The utility model discloses a direct reading pressure meter supporting tube for high pressure physical property sampling of underground fluid. The direct reading pressure meter supporting tube comprises a tube body, a first connector component and a second connector component, wherein one side of the tube body is split partially in the axial direction to form a cavity where the direct reading pressure meter can be taken and placed; the first connector component and the second connector component are fixed to the two ends of the tube body respectively, a cable is arranged in the first connector component, one end of the cable is divided into two paths to be connected to a first plug and a second plug, and the other end of the cable is electrically connected with a ground direct reading system; the first plug is arranged on the first connector component and electrically connected with the direct reading pressure meter located in the cavity; the second plug is arranged on the second connector component and electrically connected with an external fluid high pressure physical property sampling device. By means of the direct reading pressure meter supporting tube for high pressure physical property sampling of the underground fluid, the pressure meter and the sampling device which are needed to be lowered in to a well at two times are connected in series so that high pressure physical property sampling can be completed by one-time lowering to the well. Therefore, the construction cost is greatly saved, and the sample qualification rate is increased.