In this paper,the authors reconstructed MOD13Q1 time- series NDVI data from 2001 to 2013 using Savitzky- Golay filter and Chebyshev Polynomial methods for classifying vegetation types in the six coalfields in Shanxi Province. The key phenological parameters were extracted from the reconstructed NDVI data,such as the beginning dates of the growing season,length of the growing season,the ending dates of the growing season,the maximum NDVI value and the responding dates. The results show that different vegetat...