Abstract: Soil samples, which were collected from three typical forests, i.e., Betula ermanii forest, coniferous mixed broadleaved forest, and Pinus koraiensis forest, at different altitudes along the southern slope of Laotuding Mountain of Changbai Mountain range in Liaoning Province of China, were incubated over a temperature gradient in laboratory. Soil organic carbon mineralization rates (C_min), soil β-1,4-glucosidase (β_G) kinetics and their temperature sensitivity (Q₁₀) were measured. The results showed that both altitude and temperature had significant effects on C_min. C_min increased with temperature and was highest in the B. ermanii forest. The temperature sensitivity of C_min〖KG*3〗\[Q₁₀(C_min)\] ranked in order of B. ermanii forest > P. koraiensis forest > coniferous mixed broadleaved forest, but did not differ significantly among the three forests. Both the maximum activity (V_max) and the Michaelis constant (K_m) of the β_G responded positively to temperature for all the forests. The temperature sensitivity of V_max〖KG*3〗\[Q₁₀(V_max)\] ranged from 1.78 to 1.90, and the temperature sensitivity of K_m〖KG*3〗\[Q₁₀(K_m)\] ranged from 1.79 to 2.00. The Q₁₀(V_max)/Q₁₀(K_m) ratios were significantly greater in the B. ermanii soil than in the other two forest soils, suggesting that the β_G kineticsdependent impacts of the global warming or temperature increase on the decomposition of soil organic carbon were temperature sensitive for the forests at the higher altitudes.