This paper discusses the application of anti-leakage technology in the construction of exterior windows in a residential building,discusses the technological process,and the key points of leakage control under the design of tongue and groove without sub-frame,and analyzes the process control of key nodes.Help high-rise building construction personnel to rationally use relevant technologies to solve leakage problems,improve the utilization effect of leakage prevention construction technology,optimize the construction process,strengthen the control of construction quality,and improve the comfort of residential buildings.