Red paddy soils under different fertilization treatments were incubated at 15 ℃, 25 ℃ and 35 ℃, and then the effects of temperature and long-term fertilization on soil organic carbon (SOC) mineralization, and the relationships between SOC mineralization and soil physiochemical properties as well as SOC fractions were studied. The results indicated that the mineralization rate of SOC decreased rapidly during the early stage of incubation (0-7 d), then decreased gradually and reached a stable state finally. The mineralization rate, cumulative mineralization, and mineralization ratio of SOC all increased with temperature. The applications of phosphate fertilizer and organic manure both increased cumulative mineralization of SOC. The temperature sensitivity of SOC mineralization (Q₁₀) was 1.31-1.75 under different fertilization treatments. Fertilizations increased Q₁₀ values compared with the no fertilization treatment. Q₁₀ values were positively correlated with SOC, total and available nitrogen and phosphate, microbial biomass carbon, easily oxidized organic carbon, and humic acid carbon. The cumulative amounts of SOC mineralization was negatively correlated with soil pH, but positively correlated with SOC and total nitrogen at the three temperatures. At 25℃ and 35℃, the cumulative amounts of SOC mineralization had positive correlations with soil microbial biomass carbon, humic acid carbon and fulvic acid carbon.