The objective of this study was to determine the effect of different mixing percentages of lint cotton grades on fiber quality properties. three Egyptian cotton varieties ( Extra G96, Super G 94 and G95) as well as, ten blending ratio of lint cotton grades were used. Upper half mean length, uniformity index, micronaire value, maturity ratio, fiber strength, reality strength, reflectance degree values and count spinning product decreased with increasing low grades percentage in the blending. Whereas, trash/gr, seed coat, neps/ gr increased. Lint cotton grade Good (G) gave the best fiber properties, spinning consistency index (SCI), fiber quality index (FQI), and count spinning product. Results demonstrated a negative correlation between Trash content, short fiber content, and most fiber properties. The lint cotton grade 75% good + 25% fully good faire was the optimum blending ratio. In contrast, 25% fully good faire + 75% good faire recorded the lowest fiber quality.