Abstract: The design of mooring system is an important problem in oceanic dynamics.In order to design the mooring system in different environments,the mooring system in the 2016 China Undergraduate Mathematical Contest in Modeling of the A question is studied.For a given mooring system,the attitude model of mooring system is established and the parameters of the mooring system in different environments are obtained.When the mooring system does not meet the working requirements of the work,a single objective optimization model of heavy ball quality is established.When the given system does not meet the requirements of the work,a single objective optimization model of heavy ball is established,and the appropriate ball weight si determined to adjust the mooring system to meet the requirements.When the cable type,length,and ball quality of a mooring system are uncertain,the multi-objective optimization model of mooring system design is established.As a result,the optimal design scheme is designed to meet the working requirements in a given environment.