Canals are damaged by frost heaving， thawing， and soil erosion in seasonal frozen soil areas. In this study， a canal lining cushion was proposed， composed of polystyrene foam board， ceramic， and epoxy resin， to alleviate the damage to the canal. In this study， the test method used was the alternating dry-wet and freeze-thaw test to investigate the degradation law of thermal insulation and bond strength of the composite liner. Also， this study investigated the protective effect of the multi-layered combined bedding on the concrete slab. Finally， this study determined the optimum admixture of ceramic sand by combining statistical methods. The test results show that ceramic can reduce the thermal conductivity of multilayer cushions. The thermal insulation of the cushion deteriorates， caused by the polystyrene foam board and concrete， and decreases linearly with the increase of test times. The ceramic content did not affect the bond strength of the polystyrene foam board interface. However， it greatly influenced the strength of the concrete interface， and the content was inversely proportional to the strength. Multilayer cushions had a better protection effect on concrete. Compared with ordinary concrete， EP-concrete reduced the loss of quality and compressive strength by 1.04% and 8.58%， respectively. The thermal insulation of the cushion and the bonding strength of the contact surface of the polystyrene foam board were taken as the control objectives， and the calculation method of the optimal amount of ceramic sand was established. The research results of this experiment can provide a certain reference for the design of the canal cushion.