There is severe blockage in the surrounding ore bearing layers of the injection well in a certain uranium leaching experimental mining area. The inner diameter of the casing of the injection well is only 80 mm. After the completion of conventional air compressor well washing, a small diameter submersible pump well washing test was carried out in three injection wells. The initial pumping capacity is around 4.5 m³/h, and the minimum pumping capacity during this period is 3.4 m³/h. The sand content of the first turbid flushing water from two wells is analyzed to be 4.36 and 5.19 kg/m³ respectively. Particle size, electron microscopy scanning, and chemical composition analysis show that the mineral debris in the settled dry residue of the well washing water is mainly composed of silt and fine sand debris, with a small amount of clay debris. Chemical precipitation mainly consists of CaCO₃, MgCO₃, and FeCO₃. The submersible pump has operated for about 27.5 h accumulatively without any failure. The test shows that the submersible pump is feasible, with less investment, low cost, high safety and convenient implementation.