To state two methods of implementing virtual assembly of 2K-H planetary gear transmission:a method connection constraint based on CATIA and a way of dimension driving.It is pointed out that assembly modeling based on dimension driving is realized easily by comparing analysis on above methods.In the end
with a method of Virtual assembly environment based on CATIA
virtual assembly of 2K-H planetary gear transmission is actualized by CATIA/API with dimension-driving technique
and the development circle of products will be shortened.