That materials satisfy the airworthiness requirements is the premise of their application on civil aircraft.material suppliers have to establish process control system according to the fundamental principles of airworthiness to ensure quality stability and consistency of materials. Combined with the work carried out by AVIC Composites Co.Ltd during the establishment of process control system for domestic composite prepreg, this article expounds the technical connotation and approach of process control for domestic composite prepreg from the six quality control elements including man, machine, material, method, environment and measurement.The implementation of process control documents (PCD) raised product qualification ratio, product quality stability and consistency and production efficiency, also reduced product costs. The remarkable economic benefits brought about by PCD will promote the spread and popularization of process control system among domestic aerial composite suppliers, willdrive the elevation of the overall level of the aerial composite manufacture industrial chain and will provide power for sustained development of aerial composites.