Abstract: In order to reduce the influence of fluctuation of coal property on indices of products and improve pneumatic cleaning effects, the intelligent SID dry separator is developed on the basis of FX pneumatic separator through technical upgrading. Thanks to the possibility to realize automatic adjustment and monitoring of vibration frequency, air quantity and pressure, separating deck inclination angle, and positioning of discharge tipping plate, the main operating parameters can be brought under control and get quantified; with the use of the coal property online monitoring system, the parameters of raw coal feed moisture and ash composition, and ash of products can be monitoring online; through the intelligent control system, the separator can perform comprehensive management functions including data collection and storage, operating process monitoring and control and issuing of alarm; the multi-variable expert system, the core technology of the separator, can autonomously execute adjustment of operating parameters. Application of the separator at Beidian Shengli Energy Co. Ltd. has achieved a goal separation result, and its operation can be basically proceeded without the need for attendance or regular patrol inspection. The percentage of refuse misplaced in coal is less than 3% while the loss of coal in refuse is below 3%.