[Objective] The sand blocking and windproof effects of high-parallel reed sand-barriers along the Korla-Golmud railway were investigated, and whether the high-parallel reed sand barrier can meet the engineering needs of wind and sand resistance was judged, in order to provide a scientific basis for sand-wind disaster prevention.[Methods] The sand blocking rate test and gradient wind monitoring of the high-parallel reed sand-barriers were conducted in the test section along the line. Numerical simulation calculations were used to analyze the flow field distribution characteristics and sand control laws of high-parallel reed sand-barriers.[Results] ① The sand-blocking rate of single-channel reed sand barrier was 93.85%. Multiple sand barriers were usually set along the railway line. The sand flow was basically cleared after passing through multiple sand barriers. ② Under the action of single reed sand barrier, the velocity distribution around the barrier was obvious, and the deceleration zone formed behind the barrier was more uniform and there was no eddy current zone. The porosity of reed sand barrier was 36.5%.The weakening impact zone of the reed sand barrier on the inflow was mainly within the range of 3.5H(H=200 cm) before the barrier and 17H after the barrier. The mean weakening capacity for the incoming flow was 29.7% and the maximum value was 48%. ③ When the wind speed exceed 6 m/s, the sand particles were mainly distributed within the 0.2H range before the reed sand barrier, and the sand flux decreased sharply after the sand flow passed through the sand barrier.[Conclusion] Through the field experiment and numerical simulation, the law of sand control of high-parallel reed sand-barrier is revealed. The high-parallel reed sand-barrier has excellent sand control capacity similar to the net sand barrier and can be used along the railway.