Abstract: In order to meet the requirement of folding-wing's cryogenic environment ground testing,the ground testing system for folding-wing is designed and its parameters are confirmed through theoretical analysis and simulation.The experimental verification is completed,the experiment result shows that the ground testing system for folding-wing is feasible and reasonable to simulate the actual loading,as the additional mass can be neglected and the ground testing system has little impact on the unfolding process.The aerodynamic load of folding-wing is simulated exactly by the ground testing system,which shows the requirement of folding-wing's cryogenic environment ground testing is satisfied.