To investigate the effects of anti-heat stress additives and vitamin E/C on the reproductive per-formance of Guangdong goose in out-of-season production，1 122 normal out-of-season egg-laying Maganggeese ( 954 female and 168 male geese) were selected，and were divided into three groups averagely，in-cluding vitamins group ( supplemented with 0. 08% vitamin C and 0. 04% E) ，test group ( supplementedwith 0. 4% anti-heat stress additives) and control group． The experiment lasted for 60 d，and the eggproduction，fertilization rate and hatching rate of each group were detected． The results showed that theegg production，fertilization rate and hatching rate in the vitamins group and the test group were higherthan those in the control group during the entire trial period，and the fertilization rate of the two treatmentgroups was significantly higher than that of the control group ( P ＜0. 05) ． The results showed that anti-heat stress additives and vitamin E/C had effects on reducing the heat stress and improving the reproduc-tive performance of goose in out-of-season production，which could significantly improve the Maganggeese fertilization rate and egg production at trough stage，and anti-heat stress additives worked better．