Abstract: Pot culture and controlling water were used to induce water stress at the grain filling stage, the change of plant height, ear length, spike numbers, grains main stem spike, seed weight per plant, thousand seed weight were investigated. Then drought resistance of hexaploid triticale at grain filling stage were analyzed by fuzzy subordinate function analysis and drought-resistance coefficients. Finally, the relationship between each morphological index and drought resistance were studied using grey correlative degree analysis. The results showed as follows: (1) The plant height, ear length, spike numbers, grains main stem spike, seed weight per plant, thousand seed weight of each variety were decreased or shorted when compared with control, and differences among triticale varieties were significant or very significant. (2) Variety “Tornado” was high resistant to drought at grain filling stage and would used as a good germplasm in wheat breeding. (3) Correlative degree between seed weight per plant, grains main stem spike, thousand seed weight and drought resistance of hexaploid triticale at grain filling stage was highest, would utilized as morphological indexes of drought-resistance.