The leakage of construction formwork will cause honeycomb and pitted surface of concrete appearance, which will directly affect the quality of concrete. Therefore, no matter what kind of material is used to make the construction formwork, the joints should be tight without leakage. When using wood construction formwork, the wood will swell and shrink due to water absorption, so the joint of wood construction formwork installation should not be too tight. After the installation, it should be watered to make the board joint closed. When watering, it is enough to be wet, and there should be no ponding in the building formwork.