As important plants' organs, the response strategy of leaves, stems and roots to environmental changes plays an important role in ecological research. However, the response of nitrogen-phosphorus allocation strategies to nitrogen deposition in different plant organs is still unclear. In order to reveal the response of nutrients in different organs under nitrogen addition, we selected Pinus tabulaeformis forest in Taiyue Mountain of Shanxi Province as the research materials. Four artificial nitrogen levels were set as control (CK, 0 kg hm^-2 a^-1), low nitrogen (LN, 50 kg hm^-2 a^-1), medium nitrogen (MN, 100 kg hm^-2 a^-1) and high nitrogen (HN, 150 kg hm^-2 a^-1). The results showed that: 1) With the increase of nitrogen addition level, the N content in stem decreased significantly (P < 0.05), the N content in root increased significantly (P < 0.05); The P content in stem decreased significantly under low nitrogen condition (P < 0.05); The N∶P of leaf increased significantly under low nitrogen condition (P < 0.05) and the N∶P of stem decreased significantly under high nitrogen condition (P < 0.05). 2) The N and P contents of leaves showed a significant allometric relationship under different N addition levels. Under high N condition, the N content allocated to leaves and stems based on P content per unit was significantly reduced, and the rate of change in the N and P nutrient relationship between roots was consistent. 3) Under nitrogen addition, the root allocated more N than the stem and leaf by using per unit P content. Low nitrogen was the best environmental condition for the growth of Pinus tabulaeformis. There were significant differences in the allometric growth relationship of nitrogen and phosphorus distribution in root, stem and leaf, and the growth showed rapid distribution of P. The results showed that the responses of different organs of Pinus tabulaeformis to nitrogen deposition were different, and nitrogen addition would lead the changes of adaptability of Pinus tabulaeformis.