A kind of fishing net was designed for safe salvaging drowning person and important floats in high sea state. The influence of factors such as the ship speed, fishing net opening and the draft depth of the salvage object on the performance of the fishing net was studied. Model test and simulating salvage operation were conducted to test the change of net force before and after the floating salvage object getting into the net, analyze the salvage object draft depth and the match conditions of the salvage objects into the net, the trawl speed for the floating object getting into the net, and the maximum impact force on the fishing net. Results show that the condition of the salvage object getting into the net is largely affected by the salvage object draft depth and the trawl speed of the ship. At a certain draft depth, when the trawl speed is greater than or equal to 2.5Kn, the salvage object can successfully enter into the net. However, when the drag speed is too fast, the vertical expansion coefficient would become smaller and is not conducive to net entering. The maximum impact force increases with the increasing of the trawl speed within the range of the test speed, and the maximum value is 27.84kN. The study shows that, the value of maximum impact force plays a guiding role in material selection, strength design of the fishing net, and calculating the structural strength of the net crane boom.