The application relates to the field of screw driving equipment and discloses a screw automatic mounting device which comprises a rack, a tooling arranged on the rack and a pressing mechanism, a pressing plate is arranged on the pressing mechanism, a pressing block is arranged on the pressing plate, the pressing mechanism drives the pressing block to press down the end of a wire harness through the pressing plate; the screw automatic mounting device further comprises a screw supply mechanism, a three-axis driving mechanism and a driving mechanism, the screw supply mechanism delivers screws to a specified area, the three-axis driving mechanism drives the driving mechanism to move to the specified area, the driving mechanism sucks the screws, the three-axis driving mechanism drives the driving mechanism to move above the wire harness
assembly, and the driving mechanism drives the screws into the wire harness
assembly. The application has the advantages that the wire harness can be pressed by adopting a mechanical pressing mode, the installation between the wire harness and the substrate is not prone to
dislocation deviation, mechanical full-automatic screw driving is adopted, the screw installation is more firm, and the situation of missed driving does not occur, so that the qualified rate of the wire harness
assembly is greatly improved.