In order to explore the effects of natural secondary forest vegetation and site factors on soil nutrient concentration, quantify the ratio of vegetation and site factors on soil nutrition, provide a basis for rationally tending secondary forests in the mountainous area of northern Hebei and improving secondary forest productivity, the natural secondary forests distributed in the mountains of northern Hebei Province were selected as the research object and a representative plot was selected and a sample plot with an area of 20m×20m was selected. The principle of uniform distribution and multi-site mixing was adopted when 0-20 cm, 20-40 cm and 40-60 cm soil layer sampling. Soil pH value (Soil pH value), soil organic carbon (SOC), total nitrogen (TN), total phosphorus (TP), total potassium (TK), and available phosphorus (AP), available potassium (AK) content were measured in experiment. Based on the results of experiment, soil carbon, nitrogen, and phosphorus stoichiometric ratio were calculated. The results showed that the soil TN and SOC of different depths maintained an extremely significant correlation(P<0.001)among different soil layers, there was also a significant positive correlation between SOC, C∶N and AK(P<0.01).The average values of C∶N ratio of three layers of soils at different depths in the secondary forest in northern Hebei mountainous area (27.74,29.96 and 29.44) and C∶P ratio (158.86, 128.63 and 119.20) were significantly higher than the average level of national soil C∶N (11.90) and C∶P (60.00).Besides, N∶P averages (6.45, 4.59 and 4.70) was basically equivalent to the national average (3.56). The correlation analysis of the soil N∶P value and the soil TN and TP values of each depth layer showed that the correlation between the TN value and the N∶P value was more significant, indicating that the factor why N∶P value was affected was the limitation of nitrogen. Environmental factors accounted for 48.64%, 53.45%, and 49.23% of soil nutrient index of the three layers of soil at different depths (P<0.001). The explanatory power after the factor interaction was stronger than that of the factor itself. After interacting with other factors, the explanatory ratios of terrain factors were 6.45, 8.06, and 3.21 times of the separate ones. From the perspective of site conditions, topographical factors did have a certain impact on the spatial distribution of soil nutrition, and the role of topographical factors in the process of tending should be paid attention to.