Based on the optimization for the test conditions,the influence of variety of tea plant,position of leaf,freshness and moisture content of fresh leaves on the dielectric properties were analyzed by LCR-bridge（HPS2816A）.The results showed that the variety of tea plant had a significant impact on the capacitance and permittivity (P＜0.05).With the decline in tenderness,the capacitance and permittivity increased significantly.The capacitance and permittivity showed a decreasing trend with the decline in the moisture content of fresh leaf,but with little change in the range of 0.7%-6.7%.Meanwhile,freshness had the similar influence on the capacitance and permittivity to the moisture content.In addition,the comparison on dielectric characteristic parameters among fresh leaves,pathological leaves,stalk and sundries (grass and leaf of camphor ) was also conducted.The result revealed that the capacitance and permittivity of pathological leaf,stalk and sundries in tea garden were significantly higher than those of fresh leaves (P＜0.01).