With the change of social-economic structure of this world,female consciousness and social status,the number of women involved in the traffic accident increases every year.Traffic trends indicate that future female drivers may be equally as likely to be involved in a crash.It is necessary that motor vehicle safety systems provide equitable injury protection to occupants of either sex involved in moderate to serious crashes.Owing to the relatively high exposure and fatal crash involvement rate,standard adult occupant safety systems have been designed and evaluated with a focus on the occupant characteristics typically representing the male population.It should be noted that the effectiveness of such safety devices is sensitive to occupant age,anthropometric size,injury tolerance,and the mechanical response of the affected body region.Because sex is expected to be correlated with these variables（except age）,current advances in safety technology optimized for male characteristics may not be equally effective in protecting female occupants.Thus,many international generally accepted passive safety assessment tests have added female dummy to be evaluation objects.Along with those changes is the increasing concern of the Auto companies to the performance of passive safety devices.However,there are few studies of female occupant protection.To make up the above shortcomings,Hybrid III 5th female dummy was used for this purpose.The main content of this dissertation is shown as following:（1）Multi-body models of frontal full width impact with Hybrid III 5th dummies seated in the driver position and front passenger position were established and validated based on the date and description of an impact test.A parametric study was performed to investigate the efficacy of restraint system.Automatic computation between parameters and models was achieved with MADYMO and MODEFRONTIER,and parametric sensitivity analysis was done.（2）Latin Hypercube Sampling was used to optimize the constraint system parameters,which results in poorest driver injury,and the best constraint system parameters were obtained.（3）A comparison of dummy responses in two matched frontal tests and an investigation of NASS-CDS data with belted occupants involved in frontal vehicle crashes were done to obtain the difference in injury patterns.The results suggest that dominating factors to responses of each body region are different for driver and front passenger.Parameters of restraint system have greater influence on head responses and less influence on chest responses for front row occupants.After parameter optimization,injury risks of head and neck for restrained front row occupants have decreased,and the Euro-NCAP score of front row restraint increased by 37.3%.The injury to small female drivers caused by airbag is much higher than male drivers.Seat belt load is the main factor of female occupant chest AIS 3+injury.And the airbag has little effect on small female right passenger.