Abstract: In order to ensure the quality reliability of the cables connected to the inner mongolia power grid, considering the long time-consuming, high cost, complex operation and incomplete coverage of traditional macro performance testing on sample, density, infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetry (TG) and inductively coupled plasma atomic emission spectrometry (ICP-AES) were combined to conduct material consistency research on non-metallic materials (insulation and sheath) of cables with the same type with different batches, based on the material consistency analysis and evaluation criteria.This method can effectively, quickly and accurately assess the consistency of non-metallic materials of cables with the advantages of small size, slight loss, convenient operation, and short test cycle.The database established by this work can reduce the quality risks and hidden dangers of cable products to guarantee long-term safe operation of the power grid.