According to StolperSamuelson Theory, China, as a country with richness of labor resources and with the increasing of export, should raise her labor income share but emerges the phenomena with the paradox to StolperSamuelson Theory. Therefore, based on enterpriselevel data and the consideration of product quality, this paper takes provincial panel data as research object, conducts empirical analysis of the influence of export on the labor income share from such four levels as nationwide, east part of China, west part of China and middle part of China, and the research finds that the reason for the nationwide phenomena of the paradox to StolperSamuelson Theory mainly emanates from the propelling in east and middle part of China, however, the export in west part of China is consistent with StolperSamuelson Theory.