The root infections of 64 native species by mycorrhizal fungi in secondary forests were examined. The results showed that 98.4% of  the tested species were more or less infected by mycorrhizal fungi. Infection by VAM fungi were found in 98.1% of the root samples. Of these, Quercus myrsinaefolia was found being infected by both ECM and VAM fungi.The result revealed universality of mycorrhizae in secondary forest of Hong Kong.It provided an important background information for further study on the ecological function of mycorrhizae in rehabilitation of secondary forest in degraded areas of South China.