With the example of garnet-biotite-plagioclase-gneiss from Qiliping,western Dabie Mountain,the P-T pseudosections were calculated in range of 0.3～1.5GPa and 450～650°C by using the latest thermodynamic data set and the software THERMOCALC version 3.33.The stability of rutile,ilmenite and sphene in such gneiss were discussed,and the retrograde metamorphism from high-pressure of rutile in this sample was analysed.The results show that rutile is generally stable in higher pressure than 0.75 GPa,and in lower pressure within a narrow temperature range;sphene is stable in conditions of 0.35～1.40GPa and lower than 565°C,and the coexistence of sphene with rutile is stable in a narrow annular range around the sphene stable domain;the rutile can be stable with ilmenite together in a large P-T range of more than 475°C in temperature and less than 0.75GPa in pressure,but the ilmenite is only stable in domain of more than 570°C in temperature and less than 0.55 GPa in pressure.The transformation of rutile into ilmenite in this gneiss and the water content in the rock system may constrain the retrograde metamorphic condition in amphibolite facies as 0.55～0.75 GPa in pressure and more than 570°C in temperature.