Rotor blade of oil mist separator

The utility model discloses a rotor blade of an oil mist separator, which comprises a rotor blade body, the rotor blade body is trumpet-shaped, ribs used as oil drop forming and discharging channels are arranged on the inner side wall of the rotor blade body, and a mounting table is arranged at the bottom of the rotor blade body. A positioning block, a pull rod mounting groove for mounting the pull rod and a positioning groove for mounting and positioning are arranged on the mounting table; and the shape of the positioning groove is matched with that of the positioning block. When the centrifugal rotor is assembled, the multiple stages of rotor blades are installed on the pull rod step by step, meanwhile, the positioning blocks of the upper-stage rotor blades are installed in the positioning grooves of the lower-stage rotor blades in a clamped mode, and relative rotation among the stages of blades in the working process is prevented. Therefore, the overlapping installation mode of therotor blades of the centr