Abstract: Based upon comprehensive analyses of the rock property parameters that may affect blastability, linear correlation analysis was made on the data obtained from the tests of static and dynamic properties, specific gravity and integrity coefficient of 14 types of rock. The result showed that the static tensile strength and specific gravity of rock, together with the integrity coefficient of rock-mass are lightly, or merely not, correlated. It was proposed that these three parameters, together with dynamic compressive strength, could be used to serve as the basic indexes for quantitative description of blastability of common rock-masses. Thereafter weighted clustering analysis was conducted and a new rock blastability classification method was established for an open pit mine of Ben-gang Mining Industry Company.