The center of reliability work is to design reliability requirements into products. Reliability work mainly includes: (1) By adopting design methods such as derating design, simplified design and redundant design, combined with the performance design work of CNC machine tools, the occurrence of CNC machine tool failures is reduced, and the inherent reliability of products is improved. (3) The specification of verification, inspection and test for reliability shall be implemented on the basis of reliability requirements. (4) The reliability of purchased parts and outsourced parts must be consistent with the reliability requirements assigned to them. Through the research on the reliability of various CNC machine tools, the low reliability of purchased parts and external parts is a common problem in domestic CNC machine tools and must be solved. (5) Establish a reliability model and estimate and assign reliability indicators. The center of reliability work is to make the reliability level of CNC machine tools meet the design requirements through manufacturing and assembly: (1) Reliability test of key components. (2) Reliability stress screening. (3) Reliability data collection and analysis in production. 14 Installation and commissioning phase Installation and commissioning of CNC machine tools for delivery to users. The focus of reliability work is to maintain the inherent reliability level of CNC machine tools. (1) Acceptance test. (2) Collection and analysis of reliability data. (3) Early failure test to control early failure. The main task of reliability work in the operation and maintenance phase is to monitor the product's characteristics and reliability growth. The main tasks are: (1) Reliability measurement test. (2) Reliability field test. (3) Collection and analysis of user reliability data. Because the price of CNC machine tools is relatively expensive, the user's usage is complicated, the user's usage can most accurately reflect the reliability level and fault conditions. Collecting and analyzing user reliability data is an important basis for the reliability design and manufacturing improvement of CNC machine tools. (Finish) XI'AN TAIMA BIOLOGICAL ENGINEERING CO.LTD , https://www.taimabio.com