Based on an introduction of the navigation environment of Yunzaobang and the Yunzaobang precautionary area,this paper comprehensively collects the elements of navigation environment in the waters,analyzes in details the composition of ship traffic flow and daily average flow,and probes into the incidents and accidents and their root causes in the Yunzaobang precautionary area and surrounding waters from 2020 to 2022.Based on the above,the safety risks of the navigation and management of ships in the waters are summarized from the four aspects of human,machine,environment and management,and the corresponding countermeasures are put forward from the perspectives of the optimization of navigation,traffic organization,new three-dimensional supervision mode and"whole process"maritime supervision and regulation.