At present, the standardization level of flat tea processing in China is not high. To solve the problems of middle and high-grade flat tea, such as bar loose and not tight straight enough, as well unstable quality, and so on, according to the processing process and quality forming principle of flat green tea, the key processing equipment of flat green tea was equipped, and a standardized production line was designed. The process parameters of each processing module were optimized according to the specific grade of fresh leaves, and the production line test was carried out. The results showed that, this production line has compact equipment connection, scientific layout, simple operation and stable operation. What’s more, the product had a flat, straight and smooth shape, green and uniform color, green and bright liquor color, high aroma and mellow taste. The leaf bottom bud leaf stretched like flower, with a uniform, green and brightcolor. The quality conformed to the request of flat green tea product. With the increase of production efficiency, the daily production capacity of dry tea could reach 307.20 kg. On the basis of improving the efficiency of medium and high-grade flat green tea, this production line could also guarantee the stability of its quality, which has a good demonstration effect for flat tea production enterprises.