In order to identify the crashworthiness of new flexible safety fence, methods was created by establishing the system of “vehicle-fence” FEA (finite element analysis) computer simulation model and combined multiple full-scale impact test based on the current available evaluation standard. Above all, the model of “vehicle-guardrail” was set up based on virtual proving ground (VPG) pretreatment software, the safety in the impact between vehicle and neotype flexible safety fence were studied from the aspects of the moving locus of vehicle, the acceleration of vehicle and the maximum lateral displacement of guardrail etc. Secondly, full-scale impact test was conducted for the guidance quality of guardrail to the tested vehicle. The test results indicated that the evaluation parameter of guardrail which obtained from the simulation were consistented with the test results, and met the requirements of the acceptance criteria.