Solid particle adding device

The utility model provides a solid particle adding device. The solid particle adding device comprises a vertical sleeve, an upper valve cover and a lower valve cover, the upper valve cover is provided with a through hole through which solid particles can be fed downwards and normal-pressure liquid can be discharged upwards, and the lower valve cover is provided with a through hole through which the solid particles can be fed downwards and high-pressure liquid can flow in; a rotor which can rotate along the longitudinal axis of the sleeve is arranged between the upper valve deck and the lower valve deck in the sleeve, the rotor is provided with one or more vertically-through channels, and the channels of the rotor are arranged to be not communicated with the upper valve deck through hole and the lower valve deck through hole at the same time. According to the utility model, particles can be prevented from contacting the high-pressure pressure pump plunger and the flow distribution check valve; operation condit