We studied leaf functional traits, namely, leaf dry matter content (LDMC), specific leaf area (SLA), leaf nitrogen content (LNC), leaf phosphorus content (LPC), and leaf nitrogen/phosphorus ratio (N/P) of three plants, which were Populus koreana, Artemisia sacrorum and Patrinia rupestris from 13 stablel plant communities in lava plateau of new volcano of Wudalianchi. We analyzed the variation among the functional traits to discuss the relationship and the adaption strategy of leaf function for the environment in lava plateau of new volcano. The results showed that:（1）LDMC was between 0.294‐0.359 g·g^-1, SLA was between 9.082-22.347 m²·kg^-1, LDMC was larger, and SLA was low in lava plateau of new volcano than that in other regions, which indicated that the higher LDMC and the lower SLA of plant were adjusted to adapt to the poor environment in lava plateau of new volcano of Wudalianchi.（2）LNC was between 9.690-15.710 g·kg^-1, LPC was between 0.669-1.078 g·kg^-1, LKC was between 10.410-29.830 g·kg^-1, N/P was between 9.781-20.990, LNC and LPC was low, LKC and N/P was larger in lava plateau of new volcano than that in other regions, which indicated that development of plant is mainly restricted by phosphorin in lava plateau of new volcano in Wudalianchi. while low LNC and greater LKC were related to soil N and K contents in lava plateau of new volcano;（3）Oneway ANOVA analysis revealed that varied leaf traits were low among community, and varied N/P, LDMC and SLA were low among the three plants also, which indicated that the similar adaptation strategies of plant to the dry and poor nutrient in lava plateau;（4）Pearson analysis revealed that N/P was significant negative correlated with LDMC and SLA.