The release rate of soil CO₂ and its factors were measured with CIRAS-2 portable photosynthesis system, then their relationship was analyzed to investigate the influences of the additional nitrogen fertilizer, phosphate fertilizer and arbuscular fertilizer on characteristics of soil CO₂ release in paddy. The results showed that: (1) The addition of nitrogen fertilizer resulted in soil CO_2release rate rising by 97.73％ in 0 cm layer, and dropped by 39.93％ and 31.36％ in 10 cm and 20 cm layer, respectively. (2) While there was no significant difference between soil CO₂ release rates after the addition of phosphate fertilizer and of CK in 0 cm layer, the rate dropped 33.84％ in 10 cm layer and rose 48.03％ in 20 cm layer. (3) The additional arbuscular fertilizer had no significant influence on all three layers. (4) The related coefficients of soil CO₂ releasing rates and their factors in the same layers were affected by the fertilizer-modes, and its impact became lighter with the increasing of depth. Compared with nitrogen fertilizer and phosphate fertilizer, mycorrhizal fertilizer had no significant influence on the soil CO₂ release.