Abstract: The lack of the global magnetic field around the Mars results in a relatively severe radiation environment on the Mars’ surface. In this paper, the radiation environment on the Mars’ surface is analyzed through the particle transport method using GEANT4, based on the Mars’ atmosphere data obtained from the Mars-GRAM model and the MCD model, with the soil data obtained by the Viking Lander 1/2 and Mars Pathfinder, and the GCRs (CREME 96 model) and SCRs environment(Solar Event of October 1989). The analysis results are compared with the measurement data from the Radiation Assessment Detector (RAD) onboard the rover Curiosity. The relative deviation between the analysis results and the measurement data is less than 50% for the secondary gamma ray and the neutron flux, and is less than 5% for the total radiation dose. The human dose received by the astronaut at different positions of Mars’ surface can be derived from the Mars’ surface radiation environment, to serve as a reference for selecting the appropriate landing region for the manned Mars exploration mission.