Abstract: In order to comprehensively clarify the river network characteristics and spatial distribution pattern, and assist the urban planning and construction of beautiful and livable park city in Chengdu. Based on 30 m resolution raster DEM data, the digital river network was extracted and its characteristics and spatial distribution patterns were discussed The results showed that the threshold value of the optimal catchment area for river network extraction in Chengdu was 7.02 km², with a total river network of 5 levels and a total river length of 4949.75 km, among which 71.30% were healthy meandering rivers. The average river network density of the whole city was 0.35 km/km², and the average river meander coefficient was 1.39. The quantitative characteristics of river networks in different basins and geomorphic types showed different degrees of difference. The spatial distribution of river network in the whole city increased with the increase of river network level, and the aggregation degree also increased. The curved river channel was more widely distributed and more uniform than the straight river channel. The evenness of river network distribution in Minjiang river basin in west was higher than that in Tuojiang river basin in northeast. Under different geomorphic types, the density of river network was the most dense in plain, followed by hills and mountains.