In view of the key quality problems affecting the rubble mound breakwater with low body，based on the actual experience of the deep sea overtopping rubble mound breakwater with low body in the Shentou three-port basin of Yangpu Port，the key factors affecting the quality are analyzed. Some quality control measures and control methods have been adopted to effectively reduce the damage caused by the waves to the rubble mound breakwater on the low body of the breakwater and improve the quality of the project. It can provide references for similar projects to improve the stability of the port and improve the safety of the whole port.