The present disclosure discloses a pressing jig of secondary battery cell, the pressing jig including: one pair of pressing plates hinge-coupled to be mutually foldable, and having space therebetween where the cell of the secondary battery may be disposed; and a locking mechanism configured to fixate a folded state of the one pair of pressing plates, wherein at least one of the one pair of pressing plates is made of a polyacetal (POM) material.