Abstract: Through field investigation, structure testing, geological survey of filling and structural calculation, the reason of cracked wall in a masonry building is obtained.According to the cracking reason of the wall, the corresponding reinforcement measures are proposed.The plastered wall is reinforced by added structural concrete column.The inside horizontal wall is strengthened by prestressed bars to improve the seismic performance of the overall structure.An addition shallow submersion foundation is added on the original foundation to minimize the net reaction force of foundation.Simultaneously, the too closed wall of water is removed and rebuilt. Finally, the cracked masonry wall is strengthened with steel meshed cement mortar.After the reinforcement processing, the structure is complete until now.