Abstract：The digital economy has become a new growth point and new engine for urban economic development under the new development pattern. The core firms of the digital economy are the foundation of the development of the digital economy. Based on the data of core firms of digital economy in Xiamen from 2000 to 2020, and 42 administrative streets (towns) as research units. Using spatial autocorrelation, kernel density, standard deviation ellipse and negative binomial regression model, this paper explores the influencing factors of spatial distribution, pattern evolution and location selection of core firms from a micro perspective, and compares the different influencing factors on location selection of different types of core firms in digital economy. The results found that: 1) The core firms of Xiamen's digital economy present the distribution characteristics of "one belt, one side and multiple points" and the "unbalanced" pattern of concentration within the island and scattered outside the island. 2) As it strengthens, the hot spot is expanding and the cold spot is shrinking, with obvious spatial locking characteristics. 3) The core firms of various types of digital economy are affected by their own characteristics, and their spatial layout and evolution have certain similarities and large heterogeneities. 4) Location factors, environmental factors, agglomeration factors, and policy factors have a significant impact on the location selection of core firms in the digital economy; Finally, Xiamen should be further leverage its ecological and environmental advantages, respect the differences in factors influencing enterprise location selection, rationally adjust and plan industrial and commercial land, and attract digital economy core enterprises to settle in.
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