The invention discloses a non-powered automatic impurity removal device for river sand mining equipment, which comprises a first impurity removal box, a second impurity removal box, a conical net cover, an inclined material guide plate, an iron impurity recovery device, an inner cylinder, arc-shaped net, rotating cylinder, propeller impeller, fixed cylinder and pressure relief valve, the upper side of the first miscellaneous removal box is fixedly connected with an inclined material guide plate in the shape of left lower and right higher; pebbles, water plants , plastic bags, branches and other sundries are blocked by the conical net cover, and move down to the inclined material guide plate, and the sundries move down and are discharged into the square tube through the miscellaneous discharge pipe, and the sundries fall out after passing through the square tube. The iron impurities are adsorbed on the magnet rod, which facilitates the recovery of iron impurities. The sand and water in the rotating cylinder are discharged through the sand outlet pipe, realizing the effect of two times of impurity removal without power, and when the water in the inner cylinder flows downward , it will make the propeller impeller rotate, then drive the rotating cylinder to rotate, which is convenient for the suction cylinder to rotate and absorb sand.