Folding storage box capable of separating internal storage space

The utility model relates to the technical field of storage boxes, in particular to a folding storage box capable of separating an internal storage space. Comprising an upper plate and a lower plate which are arranged up and down, a plurality of first supporting columns are arranged between the upper plate and the lower plate, a containing cavity is formed between the upper plate and the lower plate, and a plurality of first side plates are arranged on the side face of the containing cavity; a partition plate can be arranged in the storage cavity and can be used for partitioning the storage cavity; a plurality of limiting grooves are formed in the lower plate, limiting blocks are formed in the first side plate and the partition plate, the limiting blocks are matched with the limiting grooves in shape, and the limiting blocks can be placed in the limiting grooves. The upper plate, the lower plate and the side plate I form a storage unit; by arranging a plurality of storage units, the number of the storage cavi