Abstract: According to detected results of Space Particle Composition Detector on board the FY-1C meteorology satellite, the paper presents radiation environmot and its distribution characteristics in the South Atlatic Anomalous during quiet days without solar proton events and magnetostorms. The effect analysis of solar proton event on July 14, 2000 on solar synchronous orbit space radiation environment has been discussed in detail. Space environment near Earth was disturbed intensively during the solar proton event. High energy electrons, protons and heavy ious possess high flux over both polar regions. The distributions of disturbances for different particles over both polar regions are different.