In order to win a confrontational game in a short time, the survival challenge strategy of URWPGSim2D simulation platform based on the International Water Robot Competition Survival Challenge Project was proposed. According to the rules of the competition, this paper proposes and designs an obstacle isolation strategy for water-robot which uses obstacles to avoid opponents and has been validated through experiments and competition. The results show that this strategy can make the water-robot effectively avoid the opponent attacks, and provide a reference for the treatment of obstacles in other games.