Based on the size of the auto parts industry market and both production and trade volume of the main components in China,this paper analyzed the status quo of the auto parts market segment. Also,this paper discussed the market segment of parts industry and the change of market share of the main components according to the features of geographical location of Xiangyang. After comparing the parts and components production of Xiangyang in 2012、2014 and 2016,this paper find that small and medium-sized automobile parts enterprises' market share increased from 77. 55% to 82. 43%; Main auto parts' transaction volume increased——the sales volume of engine,gearbox and axle reached 1. 5 million units,540000 units and 1. 65 million sets each,with the growth rate of 76. 5%,20% and 17. 9%. It remained a high-speed and steady development,which indicated the tend of transformation and upgrading of the auto parts industry and a bright prospect in Xiangyang.