Abstract： The normal and aborted ovules of litchi (Litchi chinensis Sonn. cv. Lanzhu), at develo pmental stage, were used as experimental material. The relationship betw een embry onic development and changes of endogenous hormones in litchi ovules was studied . The results showed that the contents of IAA， GA1+3 and ABA in nor mal ovules reached their highest level on the 7th day after anthesis, and then decreased, but the contents of IAA and GA1+3 increased again from hear t to torpedo stage, and CTK content was higher before the globular stage. ABA content in aborted ovules maintained a relatively high level, but t he contents of IAA and GA1+3 dropped to the lowest level, and CTK content was obviously lower than that in normal ovules during the embryo abortion. The changes in the contents of ZRs，DHZRs and iPAs showed different characterist ics and affected the embryonic development at different stages. The relations hip between the ratios of n(ABA)n-1(IAA+GA1+3)， n(ABA) n-1(CTK) and embryonic development was also discussed. Fig 3, Ref 10