Abstract  [Aim]  Grapholita molesta and Carposina sasakii are major insect pests in pear orchards, causing serious losses to pear fruit yield and quality. The aim of this study was to monitor the adult population dynamics of G. molesta and C. sasakii within a pear orchard, to determine the frequency and population dynamics of these pests. [Methods]  The study was carried out in the Yuncheng and Jinzhong pear orchards in Shanxi Province. Sex traps were used to monitor the occurrence of adult G. molesta and C. sasakii for two consecutive years (2021-2022), and the population dynamics of the two species were analyzed. [Results]  In Yuncheng and Jinzhong Liyuan, there were four peak occurrence periods of adult G. molesta per year. Overwintering G. molesta adults began to emerge in late March, with the population peaking in mid-April. The 1st, 2nd and 3rd generations peaked in mid-June, mid-July, and mid-late August, respectively. The occurrence of C. sasakii had two and three peak periods during 2021 and 2022, respectively. Overwintering adults C. sasakii began to emerge in late May, with numbers peaking from late June to early July. The 1st and 2nd generations peaked in early mid-August and mid-September, respectively. [Conclusion]  By investigating and analyzing the occurrence and population dynamics of G. molesta and C. sasakii, the findings of this study provide a theoretical basis for predicting and implementing comprehensive control measures for these two species.