Regional syndicated emission reduction is a vital step to realize the regional emission reduction target. This paper establishes the evaluation index system of regional syndicated emission reduction from three dimensions, relative advantage, connection and diligence of regional syndicated emission reduction. Haken model is employed to set up regional syndicated emission reduction evolution function with its evolutional mechanism analyzed and China's provincial syndicated emission reduction level from 2008 to 2017 measured. This paper also applies Kernel density to estimate its dynamic evolution. Regional emission reduction connection is an order parameter, leading the evolutional process, and promoting the systematic development of China's provincial syndicated emission reduction together with relative advantage of regional syndicated emission reduction. China's provincial syndicated emission reduction level diminishes westward, and is at the preliminary stage. A typical regional variance in China's provincial syndicated emission reduction level, rising with multiple differentiation in the east, rising-descending-rising in the center and rising in the west.