Abstract: Near-Earth space swarms with various application satellites, manned spacecraft, manned space laboratory. Large numbers of high-energy particles captured in the magnetic field seriously affect the safety of spacecraft, detection equipment and astronauts. So, it is necessary to study the high-energy charged particle flux distribution and the environment of a high degree of internal radiation and of low altitude. This paper studies particles in a space radiation environment, proton distribution in the space environment and the transmission in materials. Simulations are carried out using Geant4 packages for the transport process of proton in different materials (aluminum, polyethylene). According to the range and energy relations and the analysis of energy deposition, a program is proposed for protection of the spacecraft.