Provided is a pentahedron machining center machine tool with a simple structure. The machine tool comprises a gantry machining center and a group of horizontal machining centers (5) arranged on a side of the gantry machining center. The gantry machining center comprises a group of vertical machining centers (1). A base of the gantry machining center is provided with an X-direction guide rail (2). A longitudinal workbench (3) is slidably mounted on the X-direction guide rail (2). A rotary workbench (4) capable of rotating 360 degrees is arranged on the longitudinal workbench (3). The machine tool is simple in structure, low in cost, and high in production efficiency and production quality.
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