Abstract: 【Objective】 To evaluate the effects of fermented feed on the production performance, egg quality, serum parameters and lipid metabolism of Jinghong laying hens during the late laying period. 【Method】 A total of 480, 54-weeks-old, healthy Jinghong laying hens were randomly divided into 2 groups with 4 replications and 60 laying hens per replication. The laying hens in the control group were fed the basal diet. And the trial groups were fed the same basal diet with 30 g/kg fermented feed. The pre-experimental period lasted for 10 days and the experimental period lasted for 56 days. 【Result】 The results showed that : Compared with that of the control group, (1) on the production performance the egg production rate of the trial group was significantly increased by 4.56% (P<0.05). (2) On the egg quality, the eggshell strength of the trial group was extremely significantly increased by 17.18% (P<0.01). The proportion of egg yolk was extremely significantly increased by 7.48% (P<0.01). The protein ratio was extremely significantly decreased by 3.69% (P<0.01). The cholesterol content of egg yolk was extremely significantly decreased by 24.90% (P<0.01). 3) On the serum biochemical indicators and reproductive hormones, the serum calcium content of the trial group significantly increased by 11.99% (P<0.05); Follicle stimulating hormone and luteinizing hormone were significantly increased by 24.55% (P<0.05) and 12.88% (P<0.05), respectively. 4) In serum and liver, the total cholesterol content was significantly decreased by 18.86% (P<0.05) and 18.54% (P<0.05), respectively. And the high-density lipoprotein was extremely significantly increased by 17.69% (P<0.01) in the liver. The other indicators were not significantly different (P>0.05). 【Conclusion】 In conclusion, under the conditions of this experiment, the addition of 30 g/kg of fermented feed to the diet has a certain improvement effect on the production performance and egg quality of Jinghong laying hens during the late laying period.