In accordance with the demand on simulating large complex minesweeping electrode-water load on land, the mode of reconstruction on land is analyzed, and the method of simulating parallel multiple small electrode pairs in electrolyte is put forward. The mathematics model of the contact resistance of electrode pairs and multi?objective decision model of simulating load optimization are established. In order to solve decision?making model, this paper simplifies it to single target decision model, obtains the solution of the single target decision model by using the Kuhn?Tucker conditions method and the solution of multiple target decision model by using the rational point method. The simulation optimization method is verified, and the calculation result show that the overall size of simulation load on land and the size of simulation electrode are significantly reduced under the condition with the same load, which confirms that the simulation method is efficient and optimization method is correct.