Abstract: To solve the problems of the low balance efficiency of automobile chassis production line, unreasonable layout and lack of information flow, the production process is restructured using the tool of value stream map. In other words, by introducing the U-shaped line and visual management and adopting flexible mode of production operation, the terminal supermarket of raw materials and products is set up. At last, as can be seen, the line balance efficiency is increased from 71.1% to 93.9%, the increment rate from 4.2% to 9.87%, the machining efficiency increased from 4.3% to 11%.