The invention belongs to the technical field of engine maintenance equipment design, and particularly relates to a composite material adjustable stator blade which comprises an upper shaft neck, a lower shaft neck, an upper marginal plate, a lower marginal plate, and a blade body; besides, the blade is divided into a central layer plate area, a central filling area, a reinforced layer plate area and a molded surface structure area, the central layer plate area and the reinforced layer plate area are composed of laminated plates formed by laying composite material prepregs, the central fillingarea is composed of composite material prepregs, and the molded surface structure area is composed of resin or single-layer prepregs covering the surface of the molded surface structure area; and thecentral layer plate area and the central filling area form a core bearing area of the blade, the reinforced layer plate area is located on the two sides of the core bearing area, and the molded surface structure area is used for ensuring that the composite material adjustable stator blade is smooth in appearance. According to the composite material adjustable stator blade, the design feasibility and engineering problems of the composite material adjustable stator blade are effectively solved, the problems that the blade configuration is complex, and layering is difficult to achieve are effectively solved, and the pneumatic bending moment and pneumatic torque resistance of the composite material adjustable stator blade is improved.