In order to promote the innovative progress of gear transmission

the concepts of gear body form and transmission structure are systematically summarized and scientifically depicted.The characteristics

development course and research status of various kinds of gear body form

tooth profile and transmission structure are detailedly reviewed and discussed.According to gear transmission principles

it is indicated that the innovation of gear body form and transmission structure is essential route of innovative progress of gear transmission.Furthermore

the compounding and match innovation strategy of gear transmission is propounded;the keystones of innovative research are generalized

and the direction of innovative progress is pointed out.