The invention belongs to a power generator spindle treatment method and particularly relates to a wind generating set spindle etched surface treatment method. The wind generating set spindle etched surface treatment method comprises the following steps that a spindle is completely wiped by using a piece of soft cloth; a bottom face bonding layer is heated to be molten; the surface of the spindle is evenly sprayed with the bottom face bonding layer; a bottom face bonding agent contains, by weight, 30-40 parts of PVC, 30-40 parts of dioctyl phthalate, 5-8 parts of bone glue, 2-5 parts of zinc stearate and 2-5 parts of wool grease; after the bottom face bonding agent is cured, the 1-2 mm surface bonding layer is coated, 3-5 layers of glass fiber belts are wound, and curing is performed; stripping and complete cleaning are performed, and then installation can be performed. The wind generating set spindle etched surface treatment method has the advantages that site operation can be achieved, construction is simple, the rust removal effect is good, and the accuracy and surface smoothness of the spindle are not influenced.