Anhui Xinlei powder provides a technology company for the mine production and refined production line of quartz sand modular hydraulic classifier, are high-tech projects. Particle separation of high precision, stable quality, low cost, have a stronger competitive advantage. It has the upper shaft assembly of its feeder tube set, and the cylinder with the axis settings are outside the cylinder, the upper end of its external cylinder cylinder cylinder overflow weir overflow weir relative to the lower, outer cylinder device equipped with the lower row of ore, bulk water, sieve and water supply, the upper part of the tube and the overflow weir overflow diversion phase configuration panels are installed, the upper part of the outer cylinder fitted in the lateral position of discharge port settings overflow tank. The utility model to the axis of the two cylinder with a hydraulic hierarchical structure, the completion of particle size, while multi-level sorting, saving the equipment height and floor space and equipment configuration costs and improve the beneficiation classification efficiency, and ease of equipment operation and management.