The invention discloses a precision guideway grinding machine workbench. The workbench comprises a base, wherein a first linear guideway is installed on the base, and a workbench body is installed onthe first linear guideway; a first concave cavity is formed in the base, and a lead screw driving device is arranged in the first concave cavity; and the workbench body is driven by the movable end ofthe lead screw driving device. In the structure of the precision guideway grinding machine workbench, the lead screw driving device is installed in the first concave cavity in the base, so that the vertical distance between the machining table surface of the workbench body and the linear guideway is greatly reduced, the influence of an error on the machining precision of a grinding machine when the workbench body runs along the linear guideway is reduced, and the machining precision of the grinding machine can be effectively improved; and the ultra-precision machining of the workbench base isrealized under the condition that a domestic large-scale ultra-precision machining master is lacked.