In order to overcome the common plow′s shortcomings of turn in one direction mattress and low efficiency,the type of 1 LF-5 .0 mount roll-over plow was designed.Basing on the theo-retical analysis,the whole of the mount roll-over plow was designed and then the main parts of the mount roll-over plow were studied.The experiment in fields showed that the mount roll-over plow was with the characteristics of simple structure and easy operation.And all indexes of the mount roll-over plow could meet the requirements of relevant national standards.It also could provide the theoretic and practical reference for the the research and improvement of the mount roll-over plow.