The utility model relates to a suction chamber structure of a high-pressure double suction pump, which comprises a suction hole, a diversion section and a spiral section, wherein the outer surface of the diversion section is provided with at least one radial reinforcing rib surrounding a circle of the diversion section. The utility model solves the technical problems that the existing high-pressure double suction pump is long in hydraulic pressure strength test time and complicated in tools. The outer surface of the diversion section of the suction chamber is provided with an axial reinforcing rib and the radial reinforcing rib, so that the voltage endurance capability and intensity of the suction chamber can be improved; and when in a hydraulic pressure strength test, the pressure test can be carried out on a whole pump body according to the requirement of voltage endurance of a pressurized-water chamber, so that the test time is shortened, and the tools can be reduced.