Controllable quantitative screw extractor structure

The utility model discloses a controllable quantitative screw extractor structure which comprises a shell, a containing groove used for containing screws is formed in the shell, a cover plate is hinged to a groove opening of the containing groove, a preparation groove with a T-shaped cross section is formed in the groove wall of the front side of the containing groove, and the preparation groove is in an inclined state with the inner portion higher than the outer portion. A lifting blocking door is installed at a groove opening in the outer end of the preparation groove, a quantitative electric push rod is installed on the groove wall of the upper side of the preparation groove, a lifting block used for fixing screws is installed on an output rod of the quantitative electric push rod, and a supplementing plate used for supplementing the screws into the preparation groove is installed in the containing groove. The problems that the working efficiency is influenced by insufficient number of taken-out screws, an