Spindle box clamping mechanism of numerical control floor type boring and milling machine

The utility model relates to a spindle box clamping mechanism of a numerical control floor type boring and milling machine in the technical field of spindle box clamping devices for floor type boring and milling machines. Comprising a spindle box, a first clamping device used for limiting the spindle box is installed at the upper end of the spindle box, and a second clamping device used for being matched with the first clamping device to lock the spindle box is installed at the upper end of the spindle box. When the spindle box is mounted and dismounted, a cover body is rotated, so that a threaded groove and a threaded block are engaged to fasten the spindle box, and when the cover body gets close to the box body, a short rod is driven to be inserted into a hole cavity of a second center hole, so that a control assembly is driven to rotate, and a transmission rod is driven to move; and a second connecting block drives a second non-slip mat to abut against the inner wall of the square groove, and then the spin