Expenditure on “Renqing” （social relations） is an important tradition of maintaining social ties in rural China， but it has become a heavy economic burden for contemporary rural families. Farmers’ migrant work may have uncertain effects on the original social relationships. From the perspective of the social network of “Renqing” relationship， this paper first analyzes the unique internal logic of China’s rural “Renqing” expenditure， and the impact of different types of labor emigration （nearby work and migrant work） on rural social relations. Then， based on the micro data of Chinese Family Panel Studies （CFPS）， a Multivalued Treatment Effects Model was used to empirically analyze the actual impact of different types of labor emigration on the “Renqing” expenditure of farmers， and this paper further discusses the different effects of labor emigration on “Renqing” expenditure in terms of regional heterogeneity and farmers’ heterogeneity.The results of this study show that different types of labor emigration have different effects on the “Renqing” expenditure. It shows that working in the vicinity of farmers’ households does not significantly affect the “Renqing” expenditure， while working far from their households has a significant inhibitory effect on “Renqing” expenditure. It means that migrant work may disintegrate or reshape the original rural social relations of farmers and may change the form of “Renqing” expenditure. In addition， the effect of labor emigration on “Renqing” expenditure is also different in regions with different economic development levels； and the inhibitory effect of migrant work on “Renqing” expenditure is more obvious in the younger group； education may increase the inhibitory effect of migrant work on “Renqing” expenditure.