As the different automotive seat-pan angle affects driver sitting comfort，musculoskeletal biomechanical characters of different figure drivers were analyzed by simulation and experimental tests.Firstly，based on human musculoskeletal biomechanical computational software，the musculoskeletal models of the 5th，50th and 95th percentile Chinese male drivers were built.Secondly，using the dynamic adjustment of seat-pan angle and the method of correlation analysis，the force and muscle activation of driver lower limb different muscles were described.Finally，a set of EMG tests on real driver leg muscles were carried out in a real vehicle.The result shows that when the automotive seat-pan angle increases，muscles activation of driver gluteus maximus，iliopsoas，semitendinosus，rectus femoris muscle，sartorius，gastrocnemius muscle and tibialis anterior are larger.The ideal variation of seat-pan angle is between 10°and 16°.