The company used the ISO9001 quality management system, the introduction of domestic and foreign advanced testing instruments and equipment, from the source to control the quality of raw materials and auxiliary materials, while ensuring stable performance of resin sand, strict control the composition of molten iron, temperature, in order to project the internal quality of the final casting; in order to ensure the stability of product quality, the company implemented standardized operations,the maximum reduce the influence of human factors on the quality of the products,and focus on identifying the key project of each section, frequency, the implementation of the whole process of quality control.