Abstract: In accordance of the problem of improper design and poor technical performance of matured cycling solid control system, the solid phase in drilling process, the formation characteristics of Shengli Oilfield, and the current status of solid control equipment are analyzed, and the solid control equipment circulation system is optimized. The optimizing program for the drilling fluid solid control system suitable for Shengli Oilfield formation features is formed. The application of the new type of shaker can improve the solid control ability of drilling fluid and decrease the circulation electric power, and the desander meet the demands of solid controlunder different conditions and save the operation area. The use of high and low speed centrifuges in series can control the solid of deep well weighted slurry, eliminate harmful small solid beads, and carry out the recover of baritite. Field test proves the solid control effect is improved significantly.