A ground impact test of space net was designed and conducted. Then the simulation of ground test was established and the comparisons of ground test and simulation results were analyzed. The impact force and tether tension of space net during impact process were investigated based on the simulation. The results show that: the simulation results agree well with the ground test results, which indicates the reliability of simulation model; the constraining tension of space net during impact process can well make the space net close up and wrap the target; the flexibility of space net can well mitigate the impact response and the tethers in impact area are more likely to fracture during impact process.