In order to carry out creep mechanism research on concrete under mesoscopic scales, Monte Carlo method has been used to put forward the meshing method of aggregate and mortar under mesoscopic scales, while combining the theory of mixture and the porous medium theory to establish the composite material model of aggregate, cement mortar and the moisture content under mesoscopic scales. Concrete aggregate random distribution and meshing program and concrete creep simulation analysis program under meso-scale have been prepared. The simulation analysis shows that the program can effectively simulate law of creep motion inside the concrete
