Disposal of filter peat was a difficult problem of reuse of waste resources in sugar mills and environmental protection，and filter peat could be used to make filter peat-based fertilizer.However，the application effect of sugar factory filter peat-based fertilizer in citrus orchards was still unclear.In this experiment，a field experiment was conducted with golden citrus as the research object，different dosages of chemical fertilizers(F1，F2，F3)and peat-based fertilizers(BF1，BF2，BF3)，and routinely applied fertilizers(N)were set up to study the effects of peat-based fertilizers on soil nutrient status，enzyme activity，and nutrient uptake of citrus and other indexes.The results showed that at the same fertilizer level，BF treatments increased soil water content，pH，organic matter，total nitrogen，total phosphorus，total potassium，alkali-hydrolyzale nitrogen，available phosphorus and available potassium by 3.56%-15.45%，8.11%-11.06%，9.28%-18.13%，9.31%-18.59%，38.88%-54.64%，9.48%-34.35%，24.08%-27.69%，24.02%-42.07%，and 21.87%-31.23%，respectively；Soil urease activity，sucrase activity，and acid phosphatase activity were increased by 7.22%-23.99%，22.09%-30.08%，and 5.72%-11.23%，respectively；The BF treatment increased leaf total nitrogen，total phosphorus and total potassium contents by 31.83%-42.95%，10.43%-37.13% and 12.28%-17.22%，respectively.In conclusion，the application of sugar mill filter peat-based fertilizer had a positive effect on improving soil nutrients and could increase leaf nutrient content.