Material exposure test box locking mechanism and exposure device

The invention relates to a material exposure test box locking mechanism and an exposure device. The locking mechanism comprises locking supports, wherein one side edge of each locking support is provided with a sliding groove, the groove wall of the sliding groove is provided with limiting notches, the locking support is provided with a guide locking piece, and the guide locking piece penetrates through the two groove walls of the sliding groove; the side walls of the test box are respectively provided with baffles arranged in a mode of being spaced from the side walls; an installation openingis formed between one end of the baffle and the side wall of the test box, separation ribs are arranged between the baffle and the side wall of the test box, the separation ribs divide the part between the baffle and the side wall of the test box into a plurality of installation grooves arranged up and down, and a guide opening is formed in the baffle; And the groove wall, in which the limiting notches are formed, of the