Abstract: In order to understand the ecological and chemical metrological characteristics of C, N, P, K in various organs of the artificial cypress forest in the hilly area of central Sichuan, master the distribution pattern of nutrient elements in the cypress forest and the nutrient restriction status of various organs, samples were taken from the leaves, branches, trunks, bark, roots and other organs of the artificial cypress forest in this area to analyze their water content, C, N, P, K content, C/N, C/P and the correlation between various elements, The results showed that: (1) The contents of C, N, P, K in leaves were significantly higher than those in other organs; The highest C/N was in branches (69.25 ± 13.09) and the lowest was in leaves (34.05 ± 8.41). The C/P of each organ varies greatly. The C/P of leaves was the lowest (602.66 ± 208.75). There was no significant difference between leaf C content and bark and branch C content (P>0.05), but there was significant difference between leaf C content and stem and root C content (P<0.05). There was significant difference between the N content of leaves and bark and that of other organs (P<0.05), but there was no significant difference between the N content of stems, roots and branches (P>0.05). The P content in leaves was significantly different from that in other organs (P<0.05), but not in other organs (P>0.05). The C/N of bark and leaf were significantly different from that of other organs (P<0.05), while the C/N of trunk, root and branch were not significantly different (P>0.05). There was no significant difference in C/P between root, stem and branch (P>0.05), but significant difference in C/P between root, bark and leaf (P<0.05). There was no significant difference between the C/P of bark and that of leaves and branches (P>0.05). Except that there was no significant difference between the C/P of leaves and bark (P>0.05), there was significant difference between the C/P of leaves and other organs (P<0.05). (2) The coefficient of variation of C content in all organs was below 7%, which belonged to weak variation; Except for the weak variation of stem, the rest of N content belonged to the medium variation; P content was moderate variation in leaves and branches, but strong variation in stems, roots and bark; The law of K content is similar to that of P content. (3) N was positively correlated with C (P<0.05), positively correlated with P and K (P<0.01), and negatively correlated with C/P (P<0.01); C content was positively correlated with K (P<0.05) and negatively correlated with C/N (P<0.05); P content was positively correlated with K (P<0.01) and negatively correlated with C/P (P<0.01); K content was negatively correlated with C/N and C/P (P<0.01); C/N was positively correlated with C/P (P<0.01).(4) The content of N and P in the cypress forest is relatively scarce, so N and P fertilizer should be reasonably increased, or the mixed forest should be formed by thinning and replanting alder and other leguminous plants to improve the soil capacity and promote the nutrient cycle of the forest land.