Aim at the discrepancy of classified capacity and stability of feature, this paper make use of BP neural net to remark and select above feature, pick out basic feature of cutting tool state.

• 针对特征分类性能和稳定性的差异，本文采用BP神经网络方法对上述特征进行评价和选择，挑选出刀具切削状态的基础特征。