Numerical control gantry structure machine tool

The invention provides a numerical control gantry structure machine tool. The numerical control gantry structure machine tool comprises a base, a platform, a stand column and a cross beam; the cross beam is a triangular prism body, and comprises a connecting face, a mounting face and an additional weight face, the connecting face is located on the bottom of the cross beam, and is in fastened connection with the stand column, the mounting face is located on one side of the cross beam, connecting mechanisms are arranged on the two corners of the mounting face, the mounting face is connected witha first spindle mechanism through the connecting mechanisms, the first spindle mechanism is arranged over the platform, linear bearing components are arranged on the two included corners of the mounting face, in cooperation with a mounting plate, the first spindle box mechanism can bear supporting of three supporting faces of the cross beam at the same time, in the use process, the worn linear bearing components can be d