The present disclosure provides a battery cell activation tray which is an activation tray configured to accommodate battery cells during an activation process of the battery cells and has a structure including a base plate having a plate-type structure in which a plurality of battery cells are located on an upper surface thereof and a supporting portion of a partition wall structure protruding at one end in an upper surface direction, a plurality of jigs located on the upper surface of the base plate and separated from each other at a predetermined interval, and one or more elastic members mounted on the jigs to adjust separation distances between the jigs by elasticity, at both of opposite outer peripheral portions.