A salt of a quinazoline derivative (N-[4-(3-chlorine-4-fluoanilino)]-7-(3-morpholinepropanol)-6-(2-fluoroacrylamide)-q uinazoline, the structure thereof is as represented by formula I). Compared with a known quinazoline derivative, the salt of the quinazoline derivative has one or more improved properties and at least has better water solubility, wherein a citrate, a benzene sulfonate, and an ethanedisulphonate thereof further have better crystallinity and are not easy to absorb moisture.
