Aligned nanofibers, filament bundle composed of large number of nanofibers have potential applications such as biomaterials, composite materials etc. A series of electrospinning experiment has been conducted to investigate the electrospinning process, through which, some parameters such as polymer solution concentration, bias voltage, distance between spinneret and collector, solution flow rate etc have been setup to do the experiment of nanofibers bundles construction. This work firstly reports electrospun nanofibers bundles through non-uniform electrical field, and nanofibers distributed with different density on electrodes from that between them. Thinner nanofibers bundle with a few numbers of nanofiber is collected for 3 seconds; therefore it's also possible that the addressable single nanofiber could be collected bridging the two electrodes.