Abstract: A processing method for splitting thread spool is to: lay a spool of resin thread on a feeding wheel equipped with a broken end lifter; deliver the resin thread through an auxiliary piece and a first yarn cutter; split the resin thread into equalized finer threads in virtue of a plurality of resin wheels and rotators; deliver the split finer thread to undergo rolling of a pressing and positioning roller; and pull the finer thread to reach a winding spool for being wound to form a yarn spool pending knitting into silk socks.