Nine classical pedo-transfer functions (PTFs) of soil saturated hydraulic conductivity(K_s) were used to estimate K_s of soils under different forests types in the Hengduan Mountains region. The results show that the estimated K_s by these PTFs deviate greatly from the measured data, indicating that current PTFs models are not applicable to the soils in the Hengduan Mountains. Considering the enrichment of soil gravels in study area, a new pedo-transfer function of K_sis established which containing soil gravel content (>2 mm, GF), bulk density (BD), organic matter content (SOM), and particle size distribution: K_s=9.48 + 12.32×BD + 0.29×SOM-1.94×GF + 2.89×silt-5.34×sand. The new pedo-transfer function can better predict K_s of forest soils in studied area with the correlation coefficient up to 0.67, which provides a crucial parameter estimation tool for studies on forest hydrological processes and natural hazards in mountainous areas.