Abstract: The objective of this research was to evaluate the applicability of remote sensing data in 2012 for large-area crop mapping over the northern Heilongjiang Province. Rice area and its spatial distribution was obtained based on ground truth data, ISODATA unsupervised classification, data fusion technique and spectral matching technique. We found that rice area in 2012 was 15389.01 km2, and it mainly distributed in Jiamusi, Shuangyashan and Jixi County. The classification accuracy was 89.19%. This method could provide some reference for extracting spatial information of regional paddy fields.