Abstract: The young shoot growth and chemical substances of fresh leaves of Dancong tea which were planted under 4 different microclimate's tea gardens were studied. The results indicated that variation of microclimate in tea gardens was more steady than nature tea garden in annual growth cycle. The high temperarure and strong sun light in summer were lowered; The temperarure was increased in cooler spring and winter, the humidity in dry autumn was raised. The microclimates with 80% & 60% shade net were confirmed that it promoted growth of tea plants,had a good shoot tenderness keep ability,reduced the content of polyphenols, increased the content of amino acid of fresh leaves and benefited to yield and quality of Dancong tea.