This study investigated how individuals' work-family enrichment (WFE) crosses over to affect their partners' marital satisfaction, as well as spills over to affect their own marital satisfaction in a sample of 361 Chinese dual-earner couples. Drawing on the conservation of resources (COR) theory, the broaden-and-build theory, and the person perception literature, we examined social support and social undermining as the underlying mechanisms responsible for the transmission processes. Structural equation modeling analyses showed that for the crossover associations, husbands' WFE related to wives' marital satisfaction through wives' perceptions of increased social support, whereas wives' WFE related to husbands' marital satisfaction through husbands' perceptions of decreased social undermining. For the spillover associations, husbands' WFE related to their own marital satisfaction through perceiving more social support in their partners, whereas wives' WFE related to their own marital satisfaction through perceiving more social support as well as less social undermining in their partners. The findings add to the literature by examining the transmission of positive experiences between marital partners through varied patterns of social interaction, as well as by highlighting perceptions of the partner's behaviors as a relevant mechanism to explain the transmission between work and marriage within the same individual.