Abstract: Using the coexistence approach proposed by Mosbrugger and Utescher in 1997, the Eocene paleoclimate of the Fushun Basin in Liaoning Province had been quantitatively reconstructed. The Eocene paleoclimatic parameters of the Fushun Basin obtained are as the followings: the mean annual temperature(MAT) 14.3-19.8℃(the median is 17.05℃ ), the mean temperature of the warmest month (MWMT) 24.1-27.7℃, the mean temperature of the coldest month (MCMT) 2.5-10.9℃, the difference of temperatures between the coldest and warmest months (DT) 17.7-22.7℃, the mean annual precipitation(MAP) 803.6-1 113.3 mm( the median is 958.45 mm),the mean maximum monthly precipitation (MMaP) 179.4-268.1 mm, the mean minimum monthly precipitation (MMiP) 10.2-12.7 mm. Compared with the current climate, the temperature of the Eocene is about 9.25℃ higher than that of nowadays(7.8℃), and the mean annual precipitation is about 224 mm more than that of nowadays(734.5 mm). The Eocene climate belongs to subtropical monsoon while the present climate belongs to temperate monsoon.

Key words: Eocene, palynology, paleoclimate, coexistence analysis, quantitative reconstruction