The simulation sandstorm erosion test to the steel structure coating was conducted by using airflow jet with sand in different erosion speed, angle, concentration and time. The mass loss, erosion wear resistant properties, micromorphology of failure surface of the specimens were discussed. The results show that erosion wear resistance of the coating is poor; the erosion rate is exponentially increased with erosion speed, existing low speed and high speed erosion stage at 45°;erosion mass loss were the highest at 45° and lowest at 90°. The characteristics of the transition from brittle material to plastic material shows that erosion is mainly micro cutting at low erosion angle, erosion wear resistance is mainly determined by the hardness; while erosion is mainly squeeze chisel cutting at high erosion angle, erosion resistance is mainly determined by the toughness. Erosion mass loss with the increase of sand dose reaches a maximum value at 300g/min; the cumulative mass loss of coating is roughly linear with time, and the erosion process obviously exist incubation period, acceleration period and stable period.