The invention discloses an angle-adjustable jig for die machining. The angle-adjustable jig comprises a bottom plate; upright columns are arranged on the left side and the right side of the lower endsurface of the bottom plate symmetrically about a central line. The angle-adjustable jig is characterized in that a linear guide rail is welded on the upper end surface of the bottom plate; a fixed base is fixedly connected with the linear guide rail; clamping mechanisms are arranged on the left side and the right side of the fixed base and fixed to the linear guide rail through bolts; a power mechanism is arranged at the middle position of the fixed base and fixed to the inner wall of the top end of the bottom plate; the power mechanism penetrates through the fixed base and is fixedly connected with a rotating table; an angle adjusting mechanism is arranged between an operating table and the rotating table; and an air cylinder is fixedly connected with the right end of the angle adjustingmechanism. The adjustment on an angle of the operating table is realized by arranging the air cylinder to push the angle adjusting mechanism to move below the operating table. The angle-adjustable jig is simple in structure and convenient to operate.