Abstract: In order to master the occurrence rule of fruit-borer in apricot orchards in Mountainous Areas of Southern Ningxia the population dynamics of Grapholitha molesta,Carposina sasakii and Grapholitha funebrana adults were systematically monitored with sex pheromone traps in Pengyang County′s apricot orchards in 2018 and 2020. The results showed that Grapholitha molesta adults emerged from early April to mid September, and its occurring peaks in late April and early May, in late May, in middle and late of June, respectively. There was no significant peak after early July. The population in different slopes presented eastern slope＞southern slope＞western slope, and the population in different slope position were mainly distributed in the middle-lower slope position of different slope. Carposina sasakii adults emerged from middle or last of May to late August or early September, and its occurring peaks in early or middle of June and in middle or last of July, respectively. Grapholitha funebrana adults emerged from early May to early September, and its occurring peaks in early June, in early July and in early August, respectively. In the mountainous areas of Southern Ningxia, the prevention and control of the three kinds of fruit-borer in apricot orchards can be based on agricultural control, giving priority to the use of physical and chemical trapping and biocontrol techniques, and strengthening the timely control of pesticides when major outbreaks occur.