Current research on the emotional issues of rural youth and young women seldom addresses the group of rural “left-behind young mothers （宝妈， bǎomā）”， who are in dire need of emotional support in this era of mobility. Drawing on Marxist perspectives on youth and Dewey’s theory of emotion， this study employs a combination of online and offline observations alongside semi-structured interviews to investigate the emotional experiences of “left-behind mothers” in the era of mobility. The findings reveal that the frequent spatiotemporal mobility of “significant others” intensifies the emotional labor burden of these mothers. Dynamic conflicts between traditional and emerging cultural values contribute to a negative emotional input in their daily lives. The multimodal dissemination and infiltration of negative digital information frequently plunge them into emotional anxiety. Furthermore， the disorderly transformation of social interaction practices and emotional content during rural societal transitions makes it challenging for these mothers to have their emotional needs adequately met. Healthy emotions possess intrinsic qualities of positive internal contagion， mental permeation， group interactivity， and practical expansiveness. These qualities can safeguard the psychological well-being of “left-behind mothers”， bolster their parenting confidence， foster their collaborative advancement， and mitigate interpersonal conflicts within rural communities， even amidst multidimensional and high-intensity mobility contexts. To address the emotional challenges faced by rural “left-behind mothers” in the era of mobility and to help them cultivate a healthy emotional world， it is essential to upgrade grassroots emotional management approaches， create harmonious interpersonal communication environments， enhance the service capabilities of mass organizations， optimize relevant institutional mechanisms， and improve their self-emotional care abilities.