Previous studies have shown that nitrogen deposition has a significant effect on the composition and diversity of soil nematode community. However, most studies focused on the effect of inorganic nitrogen, and the influences of different forms of N on soil nematode communities remained unclear. Based on the five-year simulated N-deposition experiment, we investigated the effects of N deposition on soil nematode communities. Four treatments, including the control (no nitrogen addition; CK), inorganic N (NH₄NO₃; IN), organic N (urea and glycine 1:1; ON), and mixed nitrogen (inorganic and organic N at the ratio of 7:3, MN), were studied. The soil nematodes were collected using the shallow basin method. The soil chemical properties, such as pH, potentiometry, soil water content (oven drying method) and elemental composition, were tested. The trophic composition, funnel analysis, and metabolic footprints were analyzed to understand the effect of different forms of N on soil nematode functional diversity. A total of 50 genera were classified. Of these 29, 37, 34, and 29 genera were included in the CK, IN, MN, and ON treatments, respectively. Rotylenchus and Macroposthonia were the dominant groups in all treatments. The results showed that IN, ON, and MN significantly increased the content of nitrate nitrogen compared with CK. The total numbers of nematodes in all treatments were not significantly different. MN significantly decreased the abundance of fungivores compared with IN, while ON increased that of omnivores-predators. Compared with CK, the IN treatment increased the diversity index (H') of soil nematodes. Furthermore, IN significantly increased the evenness index (J') compared with CK and MN. The dominance index (λ) was the highest in the MN treatment, and the nematode channel ratios in all treatments were more than 0.75, indicating that the process of soil decomposition occurs mainly through a bacterial-based energy channel. The results of the nematode funnel analysis indicated that the structure index in the CK and ON treatments was high, while the enrichment index was low, showing that the degree of interference was low and the soil food-web tended to be structured. The enrichment and structure indices of nematode communities in the ON and MN treatments were more than 50, indicating the stability of food web in the soil. The metabolic footprint and biomass carbon of fungivores were the highest in the IN treatments among all treatments. ON and MN significantly increased the metabolic footprint and biomass carbon of omnivores-predators. All results indicated that N deposition with different forms of nitrogen fertilization affected not only the composition of a soil nematode community, but also its metabolic footprints. Our findings contribute to understanding the response mechanism of temperate forests to nitrogen deposition.