The increasing amount of space debris and defunct satellites poses a significant threat to the usability and sustainability of orbital resources in space.Space tether-net capture is a novel and effective removal method，and the design and optimization of its core component，i.e.，the space tether-net system，is an important prerequisite for the successful completion of on-orbit capture missions.Focusing on the collision process between the space tether-net system and the target，the dynamics of the space tether-net system and the dynamic model for tether-net-to-target collision are established based on the finite element method and Hertz theory.The captured collision process for different configurations and parameters of the space tether-net is simulated and analyzed by Abaqus.Meanwhile，with the help of Design-Expert，a three-factor response surface experiment is designed on the basis of mesh shape determination.After the interactive response analysis and optimization of several sets of experimental data，the optimal mesh configuration and parameters are obtained.The simulation verifies that the maximum contact normal force is 83.9 N，the maximum slip is 14.379 mm，and the maximum elastic strain energy is 836.4 J，which are all within 7% of the optimal target values.The optimization strategy reduces the contact normal force and slip displacement during the collision process of tether-net capture，decreases the probability of accidental entanglement or tearing of the tether-net during the capture process，and ensures sufficient elastic strain energy to meet the requirements for energy buffering.This approach provides valuable insights for the design of space tether-net configurations and parameters，offering a safe and reliable guarantee for space on-orbit capture missions.