In order to understand the effect of soil litterfall on soil respiration, the Li-6400 chamber was used to measure the respiration of the soil without treatment(R_S), the soil removed litterfall(R_D), and the litterfall respiration(R_L) in three forest types (Betula platyphylla-Larix gmelinii forest, Pinus sylvestris var. mongolica-Larix gmelinii forest, and pure Larix gmelinii forest) in northern DaXing'an Mountains. The soil respiration rate decreased when the litterfall was removed. In the observation period, the average R_S were 7.32 μmol m^-2 s^-1, 8.55 μmol m^-2 s^-1, and 6.66 μmol m^-2 s^-1 in BL, PL, and L, respectively. The average R_D were 6.46 μmol m^-2 s^-1, 7.98 μmol m^-2 s^-1 and 5.74 μmol m^-2 s^-1, respectively. However, the total soil respiration rate increased by 13.85%, 16.21%, and 13.73% in BL, PL, and L, respectively. The R_S and R_D presented a shape of single-peak curve in three forest types, which were not affected by litterfall removing. The peak values of R_S and R_D appeared in August, while the R_L did not show an obvious seasonal dynamic. There was no significant changes (P>0.05) in soil temperature and soil humidity whenever the litterfall was removed or not. The increases in average soil temperature ranged from0.11 to 0.16℃ in three forest types. The average soil humidity increased by 2.92%, 3.10% for BL and L, respectively, while it decreased by 16.39% in PL in the observation period. There were significantly positive correlations between R_S and R_D and the temperature of top 10 cm(T₁₀), which could explain 49.7%-57.0% of total changes in the seasonal dynamic of R_S and 56.7%-61.3% of R_D, respectively. However, the influence of the humidity of top 10 cm(W₁₀) on soil respiration was weak and varied in three forest types. The respiration of surface litterfall is an important part of soil respiration. Also, the surface litterfall has great influence on soil respiration, soil temperature, and soil humidity. The study of litterfall respiration is of great significance for soil respiration.