The optimization of electric field distribution in cable terminals is an urgent problem to be solved in thesafe operation and test of submarine cable

which can optimize the electric field distribution of cable terminals in or-der to improve the safety and reliability of its operation. Safe operation and testing is an urgent problem to besolved. ]. In this paper

based on the finite element method

the research and analysis on the electric field of subma-rine cable terminals is carried out

considering the actual operating environment of the terminal and the actual produc-tion conditions

the electric current-temperature-voltage simulation method is used to optimize the main insulationand stress cone insulation materials of the cable. At the same time

the partial curvature of the stress cone metal andthe proportional distribution of the stress cone metal and the insulating part are optimized to find the optimal distribu-tion of the electric field. The results show that the use of electric field and the temperature-related non linear materialshave greatly improved the distribution of the electric field in the terminal

and the intensity of the stress junction pointis reduced by 25.83%

the maximum electric field intensity on the interface is 12.91%;the curvature of the metalstress and the proportion distribution of the metal and the insulation are optimized and optimized respectively. Whenthe radius of curvature of metal stress is 81 mm and the metal stress is increased 20 mm

the electric field improvesthe most

the electric field intensity of stress junction point reaches 27.47%

the maximum electric field intensity onthe interface is reduced by 24.55%

and the reliability and safety of the submarine cable terminal are improved.