English：

Taking the box formwork shear wall concrete modular buildings as the research object, thispaper deeply analyzes its structural characteristics and deduces the construction process of single modulehoisting and multiple module assembly based on the characteristics of system construction. The stresscharacteristics and deformation distribution of the wall formwork during bolt tension has been analyzedthrough conceptual analysis and finite element method, revealing the potential cracking risk of the wallformwork. The results indicate that,when the bolts are pulled together, the wall formwork will exhibit abending deformation that protrudes towards the outside of the module,with a deformation distributionsimilar to that of a two,way plate. The lightweight partition wall plays a role in the embedded end of thewall formwork, and the maximum tensile and shear stresses of the wall formwork occur at the junction ofthe lightweight partition wall and the wall formwork,which poses a significant risk of cracking.Considering the cracking mechanism of wall formwork, construction optimization suggestions such ascontrolling the pre tightening force of tension bolts and optimizing the back rib structure have beenproposed, and their effectiveness has been verified through on,site tests.