The invention discloses a reliability test platform for a radial hydrostatic bearing. The reliability test platform for the radial hydrostatic bearing comprises a test platform support, a radial hydrostatic bearing assisting device, a regular Z-directional loading device, a negative Z-directional loading device, a regular Y-directional loading device, a negative Y-directional loading device and an automatic control device. According to the test platform, four sets of hydraulic loading devices are adopted to simulate dynamic and static pressure load of the radial hydrostatic bearing as well as loading within 360 degrees in the radial direction; the reliability test simulating the real working condition is performed for the tested radial hydrostatic bearing; in addition, the fault data are acquired in real time; therefore, practical foundation data are provided for later reliability evaluation, reliability modeling and reliability predicating, and as a result, the data acquiring time can be greatly shortened.