In order to evaluate the autonomy levels of Unmanned Platforms, A new hierarchical model for autonomy levels of unmanned platforms and a new evaluation method are provided. Firstly, human interface, situational awareness, environmental adaptation and decision-making of an unmanned platform are determined as four indicators applied to evaluate the autonomy levels. Secondly, evaluation method is used to quantify the four indicators. Finally, the average of the four indicators is the value on behalf of the autonomy level. The new model has been applied to judge the autonomy level of Global Hawk USA, Red FlagHQ3 UGV and Spartan Scout USV. The results show that the four indicators are comprehensive and visualized, and the evaluation method is simple.