Detection tool for boring hole of product

A product boring gauge relates to the related field of gauges and comprises a placing table, a cushion block is slidably arranged on the placing table, three vertically through fixing holes are formed in the cushion block, the three fixing holes are evenly distributed in a bilateral symmetry mode, a fixing screw is arranged in the cushion block in a threaded mode, a lower positioning pin is arranged on the lower side of the fixing screw in a threaded mode, and a positioning pin is arranged on the lower side of the fixing screw in a threaded mode. An upper positioning pin is arranged on the upper side of the fixing screw in a threaded mode, the lower positioning pin and the upper positioning pin which are appropriate in size are selected to be inserted into holes in the upper side and the lower side of a piston correspondingly, so that the fixing screw penetrates through the upper positioning pin and the lower positioning pin, the threaded lifting rod is screwed, and the piston can be fixed through the upper p