The invention provides a structure unit for mounting a binding tape of a wire harness corrugated pipe, which comprises a positioning block, wherein the positioning block is provided with a first arc-shaped clamping groove for fixing the corrugated pipe, the middle of the first arc-shaped clamping groove is provided with at least one second arc-shaped clamping groove used for mounting the binding tape, the depth of the second arc-shaped clamping groove is greater than that of the first arc-shaped clamping groove, the width of the second arc-shaped clamping groove is greater than that of the first arc-shaped clamping groove, and the slope wall on one side of the second arc-shaped clamping groove is provided with a groove allowing the binding tape to extend in from the slope tope on one sideand extend out from the slope top on the other side in a unidirectional mode. The invention further provides a mounting plate for mounting the binding tape of the wiring harness corrugated pipe, whichcomprises a prefabricated mounting plate body and a plurality of structural units, wherein the mounting plate body is provided with a plurality of fixing grooves used for fixing the structural units.The invention also provides a method for mounting the binding tape of the wire harness corrugated pipe, which comprises the steps of putting the corrugated pipe into the first arc-shaped clamping groove, and enabling the binding tape to extend in from the side, which is provided with the groove, of the second arc-shaped clamping groove and then extend out from the other side of the second arc-shaped clamping groove.