By dry or wet deposit process, pollutants in atmosphere can be transported into earth's surface environment to influence soil-plant system and water quality . Therefore study on characteristics of deposit from atmosphere is believed important for such inf luence function. For severe air pollution situat ion,Shijiazhuang city was chosen to detect its wet deposit status. Though located in the control area of SO₂ in China, Shijiazhuang city has not been suffered acid rain influence. To probe into the reasons, this research collected winter snow samples to detect chemical components. The results show that the general ion concentrat ion in the samples is rather high. The major anions in the samples are SO₄^2- and HCO₃^- , NO₃^- is nonsignificant . The major cat ions in the samples are NH₄⁺and Ca²⁺, which were carried into the air by raising dust .The high ratio of (ρ(NH₄⁺)+ρ(Ca²⁺))/(ρ(SO₄^2-)+ρ(NO₃^-))with the value 1. 93 is thought to be the main reason for the restraining of acid precipitation forming revealing strong antacid ability of the atmospheric environment . Morphology analyse conducted under scan elect ron microscope demonst rates cong lomeration and sphere coming from burning process are in the majority of insoluble part iculates in snow samples, follow ed by sem-i regular-minera-l granule. Snow w ashing brings these suspended part iculates down to the soil and water from air.