Abstract:     The essence of competition for talent is the competition of ecological environment, and analyzing the difference effect of talent ecological environment and its subsystems on the aggregation of highly educated talents has important guiding value for scientifically formulating talent policies. Based on the data of highly educated talents in 31 provincial-level regions of China from 2000 to 2018, this paper analyzes the aggregation and change characteristics of highly educated talents in China, empirically tests the impact of talent ecological environment and its subsystems on the aggregation of highly educated talents and finally evaluates the talent ecological environment of different provincial-level regions by using entropy method, factor analysis, OLS regression model and taking the talent ecological environment index and the aggregation effect of highly educated talents as the core indicators. The results show that: (1) Beijing, Shanghai and Tianjin are highly concentrated areas for highly educated talents in China. The west, especially the southwest region, is a weak area. The difference in talent gathering power between the two is generally large, but it has shown a shrinking trend. (2) The talent ecological environment has a significant impact on the agglomeration effect of highly educated talents, and generally shows the N-type weakening trend of first increasing, then decreasing and then increasing. (3) The impact of talent ecological environment subsystems on the agglomeration effect of highly educated talents shows differences and variability. Among them, the regional economic development environment, innovation environment, social and cultural environment have a greater impact on the agglomeration effect of highly educated talents, but appear to be weakened, the impact the of living service environment especially housing price is gradually strengthened, and the talent market environment has an impact, but it is not stable. (4) Beijing, Shanghai, Guangdong are the best provincial-level regions for a talent ecological environment in China. The Yangtze River Delta is the best area. The midwest is relatively weak. The range in the talent ecological environment between regions is expanding, and the advantages and disadvantages of the talent ecological environment in various provincial-level regions are obvious.The above research conclusions have important guiding significance for talent policy-making in different regions. First, due to the scarcity of high-end talent resources, the competitiveness of the advantaged areas in the ecological environment for talents will not weaken in the short term. Therefore, it is necessary to optimize the ecological environment of the weak areas with the help of national macro policies, support attracting more high-end talents, and adjust the unbalanced distribution of high-end talents in various regions. Second, due to the inherent differences in the economic and technological environment of various regions, the regions with weak talents need to gather high-end talents to develop their economy, but their own ecological environment for talents is not enough to attract high-end talents. Therefore, this requires appropriate administrative tools to adjust market attractiveness. Third, each region should improve the comprehensive environmental index according to its own advantages and disadvantages of the talent ecological environment to attract high-end talents, instead of blindly participating in "the battle for talents".

Key words: ecological environment, highly educated talent, influencing factor, comprehensive evaluation