Spiral sand separator main characteristic is that the structure is compact, the ground installation, high discharge point, without digging the ground of stores, covers a little of space, more important is that the same kind product maintenance cost of home and abroad is high, accessories are difficult to buy can be solved. It has redesigned the screw shaft head parts and structure and prolong its service life, seal and bearing can be convenient to buy in the local user the user. Maintenance personnel is able to change skillfully and rapidly, don't delay production. It can save the equipment maintenance costs for users, improve the production efficiency. The inclined design, can effectively guarantee the material of solid liquid separation thoroughly; the materials' accumulation inside can effectively prevent wear; the feed hopper of reinforcing tape flushing tube can prevent  strike and material deposition.