It have been studied with wind tunnel experiments that the wind erosion rule of loosing soil on the hungriness sand land of western Inner-Mengolia,the impact of wind flow with sand on the wind erosion amount,the mechanism by use of PAM to keep from wind erosion of loosing soil and its capability to withstand wind flow with sand.The samples were taken in sequences about the impact of wind flow with sand on the wind erosion amount and anterior sample applied wind flow with sand for posterior one.The 3 levels of PAM dosage(1 g/m2,2 g/m2 and 4 g/m2) and 4 wind degrees(0,17.6%,36.4% and 57.7%) was contained in the tests for PAM sample capability to withstand wind flow with sand.The results showed that the erosion ability of wind flow with sand was much more than the ability of pure wind when the wind velocity was equal and the wind erosion amounts of them were evidently different.The samples just only withstood wind flow with sand for 5 to 10 minutes with a wind velocity of 7~8 m/s when PAM dosage was 1 g/m2.However the samples would withstand wind flow with sand for 30 minutes with a wind velocity of 8~10 m/s when PAM dosage was 2 g/m2.It would withstand wind flow with sand for more than 30 minutes with exceeding 10 m/s wind velocity when PAM dosage was 4 g/m2 and the sample almost could prevent 99% of all soil erosion caused by natural winds.The dosage of 2 g/m2 PAM was recommended normally and economically in the paper for most of wind erosion(about 97%~99%) could be prevented.The surface could form a crack when PAM solution was sprayed on loosing soils surface so that it could effectually prevent from wind erosions.