The sustainability of Policy of Turning Cultivated Land Back into Forests and Grasslands (TCFG) in Loess Plateau region was analyzed through surveying and investigating the farmers and local governors. The conclusions are as follows: although some supplements or improvements are still needed to improve TCFG, the TCFG has produced great impact and solid foundation in Loess Plateau region. The TCFG is far better than other ecological construction measures in strategic superiority and guarantee systems. With the improvement of TCFG, the activities of TCFG will be developed sustainably and efficiently.