Abstract: 【Objective】 It is important to understand the effects of different forest types on the spatiotemporal dynamics of earthworm number and biomass in soil.【Methods】The electric shock method was used to explore the spatiotemporal patterns of earthworm number(density)and biomass in three forest types in Kunming City, Yunnan Province. The correlations between the soil physical and chemical environment and soil earthworm number(density)and biomass changes were assessed by the analyses of correlation and variance among the three forest communities.【Results】Forest community type had significant effects on earthworm number(P = 0.001)and biomass(P = 0.006). The order of soil earthworm number was Pinus yunnanensis community > Eucalyptus maideni community>open forest community, and that of earthworm biomass was P. yunnanensis community>open forest community>E. maideni community. The temporal variation of both measures were ranked in the order September>November>October. The earthworm number and biomass in the E. maideni community and the P. yunnanensis community were mainly distributed in the ≥5-10 cm soil layer, and those in open forest were mainly concentrated in the 0-5 cm soil layer. Soil physicochemical properties had diverse effects on earthworm number and biomass. Soil pH, soil temperature and nitrogen hydrolysis showed positive correlations with earthworm number and biomass in the E. maideni community(P<0.05). However, while soil water content, soil organic matter and total nitrogen had similar spatiotemporal changes as the variation of earthworm number and biomass, they were not significantly correlated with the earthworm number and biomass. In the P. yunnanensis community and open forest community, earthworm number and biomass were significantly correlated with soil temperature(P<0.05), but soil water content, soil organic matter, total nitrogen, soil hydrolyzable nitrogen had no significant correlations with earthworm number and biomass.【Conclusion】 There were significant differences in the spatiotemporal distributions of soil earthworm number and biomass under the three forest types, and the differences were closely related to the changes in soil physicochemical properties(e.g., soil temperature, soil water content, pH and soil nitrogen content).