Abstract: A kind of half-track walking device of tractor for hill area to solve the problem of bad crawling ability and low efficiency was designed.This device mainly consisted of walking bracket，decelerating mechanism，track driving wheel，guiding wheel，some supporting wheel，rubber track and tensioning mechanism.It could fit hill area well and didn′t slip.Field driving performance tests showed that the line speed error was in 4% between front-wheel of tractor and track driving wheel，which was accord with the design aim.The successful development of this half-track walking device was good for promoting hill area agricultural machinery development.And it provided reference for other enterprise or research organization to design half-track walking device.