砖混结构房屋的楼板板缝开裂是一种常见的质量通病，有的是在竣工验收时就发现了，也有的是在使用之后才出现，轻者影响美观，验收时达不到合格标准，重者造成板缝渗漏水，影响房屋使用功能。针对这种质量问题，结合实践，简要分析一下预制板的板缝开裂成因及防治办法。笔者认 Cracking of floor slab seams in brick-concrete structural houses is a common quality problem. Some of them are discovered when they are completed and accepted, and others are only used after use. Lighter ones are aesthetically-pleasing, and they do not meet the eligibility criteria for acceptance. Leakage of water through the board seams affects the function of the house. In view of this quality problem, combined with practice, a brief analysis of the prefabricated board cracking causes and prevention methods. The author recognizes