[Objectives]  To determine the frequency of occurrence of Chilo suppressalis in Harbin. [Methods]  Black light traps were used to capture adults and captive colonies were maintained both indoors, and outdoors, to determine the number of generations, dynamic changes in each life stage, and biological parameters such as developmental duration and fecundity, for two consecutive years from 2020 to 2021. [Results]  The results show that C. suppressalis can complete two generations in Harbin, with one to two generations occurring each year. Very few larvae that hatch before June 15 diapause and all have two generations. The peak pupation stage of overwintering larvae was from late May to early June. The average pupal stage was (9.64 ± 2.28) d. The peak of eclosion of overwintering adults was in mid-June. Light-trapping data indicate that there are two obvious peaks of adult abundance; in late June and from the end of July to early August. Over 70% of adults were captured in light traps between 20:30 and 21:30, and the ratio of females to males captured was 1︰0.21. At 25 ℃, adult lifespan was (7.27 ± 2.08) d, the egg stage was (5.84 ± 0.77) d, the oviposition period of the overwintering generation adults was (3.91 ± 0.98) d and the number of eggs per female was (318.40 ± 125.76)d. The duration of the oviposition period of first generation adults was (4.31 ± 1.02) d and the number of eggs laid per female was (420.31 ± 167.87) d. Adults lay eggs more than 77% of all eggs in the first two days of the oviposition period. Peak abundance of first-generation adults was from the end of July to early August, and the peak of second-generation eggs was in early August. Although instars 5-7 can overwinter 91% of overwintering larvae are from the 6th to7th instar. [Conclusion]  The annual life history of C. suppressalis in Harbin was determined and the generation number and temporal occurrence peaks of this pest have obviously changed. These results have important theoretical implications and practical value for improving both the forecasting and control of C. suppressalis in Harbin.