Slash burning is an effective management to clean plant residue before seedling plant in tropical and subtropical forests. Although many studies have been showed that slash burning stimulated carbon emission from soil, there still lack understanding on how fire intensities on soil respiration in subtropics. In this study, clear cutting an evergreen broad-leaved secondary forest dominated by Castanopsis carlesii and leaving the plant residue on the surface soil before slash burning are used. The High fire intensity (HF) and low fire intensity (LF) treatments were set up after slash burning. Soil respiration was measured by LI-8100 at the early stage of the tree plantation (from March to December, 2012), and soil temperature, soil water content and rainfall were surveyed simultaneously. The results show that:(1) slash burning stimulated soil respiration but highly temporal variation with times. Compared with the control (CT), soil respiration in HF and LF increased by 76.3% and 55.3% in the first two months after slash burning (P<0.05), respectively. However, there were no significant differences among treatments from 2nd-5th months after slash burning (P>0.05). Then, slash burning decreased soil respiration after the 5th month (P<0.05), while HF and LF decreased by 40% and 32.6% to CT, respectively. Thus, slash burning did not stimulated the sum of soil CO₂ emission during the observation period. (2) soil respiration was significantly correlated with soil temperature in the HF treatment (P<0.05) with low fitting determination. However, no significant correlation between soil respiration and soil temperature was found in other treatments. (3) A single precipitation event stimulated soil respiration rate in both HF and LF, but not in the CT. We also found that rainfall promoted soil respiration in the early time and inhibited soil respiration in the late time during the continuous precipitation.