The invention discloses a method for modifying and processing an amorphous silicon oxide nano wire, relates to a method for modifying and processing a nano wire through modification, and provides a method for modifying and processing an amorphous silicon oxide nano wire. The method comprises the following steps: scraping silicon oxide nano wire powder from a silicon chip substrate, dispersing thepowder to a suspension with uniform color by using an organic solvent, then adding the organic solution containing the silicon oxide nano wire to copper wire mesh attached with a micro-grid carbon film, and standing the mixture to obtain a TEM sample; placing and fixing the TEM sample in a sample seat, pushing a sample rod into a sample chamber, vacuumizing a transmission electron microscope, andobserving and analyzing the silicon oxide nano wire in the sample; roughly selecting the silicon oxide nano wire in a TEM low-power observation mode first, and then further screening the roughly-selected nano wire in a higher-power observation mode; and shooting the shape of the selected nano wire before modification by using a CCD attached to the electron microscope first, then performing radiation on the nano wire, shooting in real time to record the shape changing process of the nano wire, and repeating the processes of 'radiating-shooting' until the nano wire with the required shape is obtained.