本文针对砖混结构房屋顶层砖墙水平裂缝及房屋端部八字缝或倒八字缝产生的原因进行了分析 ,提出了较为适用的防治措施 ,并通过工程实践验证了某些措施的正确性。 This paper analyzes the horizontal cracks in the brick masonry building roof and the reason of the character-shaped stitching or inverted character stitching on the end of the building, puts forward the more suitable control measures, and verifies the correctness of some measures by engineering practice.