As effect of FDI on provinces with different economic growth quality is something different, Threshold Effect can’t interpreted completely, this paper estimates the effect of FDI on economic growth quality, use the method of Quantile Regression with the data of 28 provinces from 1992-2012, and gets the conclusions as fellows. First, with quality?from low to high, the effect of FDI on economic growth quality showed a trend of increase after the fall, this shows the existence of the FDI threshold effect. Second, for the provinces with quantile around 0.5, FDI technology spillover effect is the biggest and the most significant. Third, the FDI technology spillover effect presents obvious regional difference, the effect significant in the eastern, not obvious in the central, inhibitory in the west.