[Objective] Studying the rules of wind and sand flow in lateral transport engineering around desert line to provide theoretical basis for the application of lateral transmission engineering.[Methods] Based on the wind data in the Liaodun area of Xinjiang Autonomous Region and 3D numerical simulation of CFD, the wind and sand flow fields of three lateral transmission engineerings were compared and analyzed under different working conditions.[Results] Due to the structure differences of lateral transportation engineering, wind and sand flow were guided laterally by the spacing of open feather-row, while closed feather-row and straight-row were conducted in front of the engineering. The flow field of three lateral transportation engineerings were all consist of the transportation area and the deceleration zone, but the deceleration zone area of open feather-row was less than those of the other two. Large wind speed and rich sand source should use straight-row engineering. Large wind speed and general sand source should use open feather-row engineering; general wind speed and rich sand source should use closed feather-row engineering.[Conclusion] Lateral transport engineering can effectively transport wind sand flow, and different types of lateral transportation structure are suitable for different conditions.