[Aim]  To monitor the population dynamics of the major insect pests, Grapholita molesta and Carposina sasakii, in pear orchards in Hebei Province, in order to determine the frequency and population dynamics of the adults of these species. [Methods]  Monitoring was conducted in Chengde City, Cangzhou City and Qinhuangdao City, Hebei Province. Sex pheromone lures and triangular traps were used to monitor the occurrence of adult G. molesta and C. sasakii over two consecutive years (2022-2024), after which the population dynamics of both species were analyzed. [Results]  G. molesta was much more abundant in pear orchards than C. sasakii. Overwintering adults began to appear at the end of March and from early to mid-April, with a first peak in abundance from mid-April to early May, a second from late May to mid-June, and a third from mid to late July. The total number of moths captured at different locations and years varied greatly, with a maximum of 2 588, and a minimum of 44, moths per trap. The highest annual trap catch of C. sasakii was 480 per trap. [Conclusion]  The results suggest that first prevention measures for G. molesta and C. sasakii should be implemented before the peak of abundance of the adult overwintering generation, i.e. in mid-April, and that the first control measures should be implemented before mid-June.