Abstract:Based on the theory of talent ecological environment, this paper takes 36 cities in China as research cases, and uses the combination of necessary condition analysis ( NCA ) and fuzzy set qualitative comparative analysis ( fsQCA ) to explore the realization path of urban science and technology talent agglomeration driven by the synergy of various elements in the talent ecological environment. The study found that : ( 1 ) The single talent ecological environment factor is not the necessary condition to realize the high agglomeration of urban scientific and technological talents, but the construction of high-quality scientific and technological innovation environment plays a universal role in realizing the high agglomeration of scientific and technological talents. ( 2 ) The high agglomeration of scientific and technological talents is the equivalent result formed by the joint action of multiple factors in the talent ecological environment. The four kinds of urban talent ecological environment can realize the high agglomeration of scientific and technological talents, which are economy * science and technology innovation * culture and education balanced drive, science and technology innovation * service double drive, economy * science and technology innovation double drive, livability * service double drive. ( 3 ) Three kinds of urban talent ecological environment inhibit the agglomeration of scientific and technological talents, namely, economy * service inhibition, economy * science and technology innovation * service inhibition, science and technology innovation * livable inhibition. ( 4 ) The agglomeration of urban scientific and technological talents in China mainly forms a spatial agglomeration pattern with the Yangtze River Delta region, the Guangdong-Hong Kong-Macao Greater Bay Area and the Beijing-Tianjin-Hebei economic circle as the center and the central and western urban agglomerations as the periphery. This study reveals the complex causal relationship between the talent ecological environment and the agglomeration of scientific and technological talents as a whole, and provides a practical reference for cities to formulate policies for the recruitment and retention of scientific and technological talents.