The invention discloses a dynamic driving environment human physiological characteristics and biomechanics test platform which mainly consists of a dynamic excitation system, a three-dimensional digital adjustable seat system, a three-dimensional adjustable driving mechanism and a human physiological characteristics and biomechanics test system. The invention can simulate the dynamic environment (vibration environment) of automobiles, which means to implement the stepless frequency conversion, the amplitude, the frequency fixation and frequency sweep vibration for the variable acceleration; simulate the posture operation of the automobiles in various driving environment; measure the human physiological character indexes of the human electromyography signals, the human arterial blood flow, the human blood pressure response, the human heartbeat number of a driver, etc., and the vibration response of every human part, the contact stress of a human-chair interface and the body pressure distribution of human buttock and back; study and comprehensively test the human physiological characteristics and the human biomechanics of the driving postures of different populations. Through the stimulation on a dynamic driving environment human physiological characteristics and biomechanics test system, scientific data required by the automobile human-machine interface design for populations with different shapes can be obtained.