To evaluate the influence associated with new energy characteristics of power fluctuation, power intermittent and layout, two types of indices and method for evaluation of new energy generator’s characteristic are established. Characteristic indices of new energy grid-connection include power fluctuation, disperse degree and test contribution degree of wiring or main transformer, which can evaluate generator’s quality, layout and modality; the indices of grid accommodation capacity include effective permeability and power balance contribution degree, which can evaluate generator’s scale and peak regulation effect. To get the applicable membership functions and corresponding normalization values, the specialist marking idea of fuzzy comprehensive evaluation method is used to improve the normalization method of “membership function model and marking form”. The application in Suizhou grid shows scientificity of these indices and method, they are useful for guidance of new energy generation connection projects and grid planning, so they have engineered value. This work is supported by National Key Research and Development Program of China (No. 2017YFB0902800).