Abstract: In order to reduce the energy consumption of bamboo stump cutter and solve the problem that the working radius of cutter cannot be adjusted, a cutter with an adjustable working radius is designed, which can break bamboo stump from inside the stump. First of all, a finite element model of bamboo stump-bamboo stump cutter is established in ANSYS, then joint-broken and wall-broken simulation is carried out and test analysis is done, finally, a test platform is built to verify it. The results show that the bamboo stump cutter developed in this paper can explode bamboo stump with an external diameter of 110-130 mm. The optimal parameter combination of joint-broken is as follows, the back angle of axial cutter is 30°, and the speed of cutter is 5 000 r/min. The parameter combination of wall-broken is that the back angle of radial cutter is 20°, and the cutter speed is 5 000 r/min.