The invention discloses an adjustable numerically-controlled machine tool. The adjustable numerically-controlled machine tool comprises a machine tool body. A base is mounted on the inner wall of a bottom plate of the machine tool body. Two first support blocks are symmetrically arranged on one side of the upper surface of the base. Two second support blocks are symmetrically arranged on the other side of the upper surface of the base. First rotary shafts are movably mounted between the two first support blocks. The first rotary shafts are movably mounted between the two second support blocks. A first gear is mounted on one side of each first rotary shaft. A chain is connected between the two first gears. Nut blocks are movably mounted on the two sides of each first rotary shaft. One end of a first connecting rod is hinged to the top of each nut block. According to the adjustable numerically-controlled machine tool, through the ingenious structure, a lathe bed of the numerically-controlled machine tool can be adjusted in height and also can be adjusted in angle, most requirements of part machining are met, the continuity of part machining is improved, and the working efficiency is improved.