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In order to solve the problem of rutting on the cold recycled foamed asphalt pavement under the action of high temperature and heavy load, and to understand the dynamic response of the road surface when the recycled mixture was used as the lower layer and the upper base layer respectively, a high - shear and dense foamed asphalt cold recycling mixture (F - B) was designed, combined with regional climate characteristics and viscoelastic theory, obtained the temperature field of different structural layers and the strain changes under moving axle load through the finite element method, and compared with the conventional gradation. The results showed that the pavement temperature field had obvious non - linear characteristics, and the shear resistance of the material could be improved by improving the gradation. There was about 10% residual strain of the pavement after unloading, and the viscoelastic model could obtain the residual deformation of the pavement, which could better reflect the formation of ruts. The longitudinal strain of the foamed asphalt layer was alternating between positive and negative, which was easy to cause road fatigue damage. Under low speed and heavy load, the use of high shear density grading could reduce the maximum shear stress of the surface layer and the generation of flow rutting. When foamed asphalt was used as the lower layer, the road surlace had better resistance to vertical deformation under heavy load. [ABSTRACT FROM AUTHOR]