The invention provides an assembly machine tool for cooling vanes. The assembly machine tool for the cooling vanes comprises a worktable unit, a positioning unit, a compression unit and a machine toolframe; the worktable unit includes a worktable and a supporting hydraulic cylinder, a first-level circular groove is formed in the center of the worktable, and a hydraulic rod of the supporting hydraulic cylinder at the bottom of the worktable penetrates through the center of the worktable; the positioning unit includes a positioning base, an ejecting plate and ejecting rods, and the positioningbase is connected with the hydraulic rod of the supporting hydraulic cylinder; the positioning base includes a chassis, clamping claws and buckling grooves, the clamping claws and the buckling groovesare alternately and circumferentially arranged on the outer side of the chassis, a plurality of through holes are circumferentially formed in the inner side of the chassis, the ejecting plate is arranged above the chassis through the ejecting rods which penetrate through the through holes, and the ejecting rods move up and down in the through holes and drive the ejecting plate to carry out vertical linear motion above the chassis; and the compression unit includes a compression plate, a compression hydraulic cylinder and a suspension arm, the compression plate is arranged on the end part of the suspension arm through the compression hydraulic cylinder, and the compression plate is located above the positioning base.