The invention discloses a folding microhole bedding face machining reverse scraping tool. The folding microhole bedding face machining reverse scraping tool comprises an end cover, a tool apron, a joint and a tool bar; the tool bar is connected with a machine tool spindle, the joint is installed on the tool bar, the lower end of the tool apron is movably installed on the joint, the upper end of the tool apron is movably installed on the end cover, a molding blade is installed on the tool apron, and the tool apron can rotate between the end cover and the joint; and when the end cover, the toolapron and the joint are connected together in sequence, the machine tool spindle rotates to drive the tool bar to rotate correspondingly, and thus the molding blade can be automatically folded and unfolded between the end cover and the joint. According to the folding microhole bedding face machining reverse scraping tool, the tool apron automatic folding and unfolding functions are achieved through the machine tool spindle, manual loading and unloading procedures are omitted, the micro-pore bedding face structure machining process is simplified, labor is relieved, and the machining efficiencyis improved.