The Pinus massoniana – Quercus acutissima mixed forest in low mountain and hilly areas of western Zhu madian, Henan Province was selected as research object, soil organic carbon ( SOC ), soil dissolved organic carbon ( DOC ) and dissolved organic nitrogen ( DON ) contents and their response pattern to exposures, soil depths ( 0—10 cm and 10—20 cm ) as well as basal area was detected. The results showed that exposure and basal area have a significant impact on the storage of SOC and DOC ( P<0.05 ). Furthermore, the influencing factors for SOC, DOC and DON storages were different under sunny and shady slope. For example, in sunny slope, the major factor for SOC content is available potassium, while it is total nitrogen in shady slope. Soil total nitrogen is the main factor for DOC and DON contents in both exposures. Moreover, soil depth also has a significant impact on SOC, DOC and DON storage ( P<0.05 ), which tended to decrease with the increase of soil layer, showed surface enrichment phenomenon. From correlation analysis, SOC, DOC and DON storages showed significant correlations with soil physical properties, i.e. soil moisture content, soil compactness and particle composition. Moreover, SOC, DOC and DON showed a positive correlation with each other, and had positive correlations with soil total nitrogen, effective nitrogen ( nitrate-nitrogen, ammonium-nitrogen and available nitrogen ), available phosphorus and available potassium ( P<0.01 ), indicating that soil nutrients are vital factors for the spatial distribution of soil organic carbon storage and soil dissolved organic matter in Pinus massoniana – Quercus acutissima mixed forest.