Abstract:The dynamic change of endogenesis hormone in leaves after chilling stress was analyzed with two pepper varieties (SJ-5 and SCH). The results showed that chilling stress promoted the production of ABA in SJ-5 more than in SCH. After five days under control temperature, the content of ABA recovered to the control level, which indicated that the change of ABA content was an emergency response to chilling stress, that is, the ABA metabolism would come back once the chilling stress stopped. Chilling stress reduced the anabolism of GA3 and IAA in leaves of peppers, and it was more obviously for SCH than SJ-5. The content of IAA would reach to the control after the stress was relieved for 25 days, and so was for GA3 in SJ-5. However, comparison with control, the content of GA3 in SCH was keeping a low-level because of the stress injury. ABA/ GA3 would resume after the stress was stopped for 25 days for SJ-5, but would not for SCH. For 25 days under normal temperature, ABA/ IAA could reach the control level for the two varieties, after then, it was lower for SJ-5 and higher for SCH than control, which indicated that the two varieties have a different chilling-adaptability.