本文分析了砌块房屋在变形荷载作用下墙体裂缝的成因，从变形的角度解释了变形荷载裂缝产生的机理，说明墙体开裂是由于构件之间的约束产生的强迫变形过大造成的。算例表明，变形作用引起的应变和应力相当大，应采取“放”与“抗”相结合的综合措施，才能有效地预防和控制墙体的裂缝。 This paper analyzes the causes of wall cracks in block houses under deformation loads, explains the mechanism of cracks in deformation loads from the perspective of deformation, and shows that wall cracking is caused by excessive forced deformation caused by constraints between components. The example shows that the strain and stress caused by the deformation are quite large, and comprehensive measures combining “discharge” and “resistance” should be taken to effectively prevent and control the wall cracks.