Abstract: Giant juncao harvesting is one of the most labor-intensive work in juncao indusstry.There is few research on giant juncao cutting and so it has no cutting device to cut giant juncao stalks effectively at present in China.Firstly，some mechanical properties of giant juncao such as stalk stretching，compression and bending，as well as some affective factors about tensile and compressive strength of giant juncao like diameter and rate of water content were summarized.By comparing the research status of different stalk cutters，it concluded that reasonably matching structure and movement parameters of disc cutters could reduce heavy cutting and leakage cutting.Meanwhile，the combination of cutting clearance and cutting blade had great influence on the shear force，as for the cutting speed of reciprocating cutting，it had little influence.Secondly，it was pointed out that virtual simulation technology could provide a new technical method for exploring cutting device，which was also a new technical field relatively.At last，it was put forward that problems of giant juncao harvesting currently and the view that cutting devices should be developed to intelligence and multi-function in the future.