Abstract: the paper introduces the advantages and disadvantages of the honeycomb core composite wallboard, and put forward various solutions on the problems that the honeycomb core composite wallboard on juncture place easily crack. According to the advantages and disadvantages, the optimal measures are to use CFRP paste connection joints. Tested by experiments, the results show that: for using cellular wall materials as new buildings retaining wall materials, CFRP enhancement processing juncture surface can effectively restrain cracks, and the results are ideal; for existing buildings retaining wall, gives suggestions about enhancement processing, and proves its feasibility.