Using the decline diseased Dongkui bayberry as the experimental material，five treatments including basal application of chicken manure substrate bio-organic fertilizer(BF)，sheep manure(SM)，pig manure(PM)，compound fertilizer(CF) and no fertilization(CK)were set up.Principal component analysis was used to comprehensively evaluate the vegetative growth and soil fertility of each treatment，and to explore the effect of organic fertilizer on the vegetative growth and soil nutrients of the decline diseased bayberry.The results showed that，compared with CK and CF treatments，BF，SM and PM treatments significantly increased the content of soil organic matter，available potassium，exchangeable calcium，exchangeable magnesium，available boron，and available zinc，increased soil pH，and significantly promoted the nutritional growth of bayberry.The shoot length was increased by 22.13%-30.74%，the shoot diameter was increased by 10.40%-11.07%，the leaf length was increased by 4.99%-7.26%，the leaf width was increased by 4.35%-5.35%，the leaf thickness was increased by 4.17%-7.92%，and the chlorophyll content was increased by 8.35%-11.29%.The comprehensive evaluation of the fertilizer effects of the five treatments was ranked as PM>BF>SM>CF>CK by principal component analysis.Basal application of organic fertilizer significantly improved soil fertility and the vegetative growth of decline diseased bayberry.It is suggested that the application of organic fertilizers should be rotated in the bayberry industry to restore the vigor of decline diseased bayberry trees.