Field survey and soil sampling for test were conducted of major tea gardens in Hunan Province to study forms and availability of zinc in the soil ecosystems. Results showed that parent material has a significant impact on form and content of soil zinc, which is related to characteristics of parent material; mulching (using biological material+crop straws) could stimulate transformation of soil zinc into available forms, notably increasing the content of available zinc and organic zinc in the tea garden soil, but does not have much influence on the content of other forms of zinc; and in terms of effect on available zinc (AZn) exchangeable, zinc (ExZn) is in the lead and followed by amorphous ferric-oxide-bonded zinc (AFeZn), manganese-oxide-bonded zinc (MnOZn), organic zinc (OMZn) and crystalloid ferric-oxide-bonded zinc(CFeZn).