The utility model discloses a child lock packaging box with an anti-falling protection function. Comprising a sleeve box and an inner box, the two ends of the sleeve box are mutually communicated or semi-communicated to form a sleeve cavity used for containing the inner box, the interior of the inner box is a cavity, a containing cavity is formed in the inner box, a partition plate is arranged on the side face of the containing cavity, the end face of the partition plate is a concave-convex face, and the partition plate is inclined; top protrusions are arranged on the side plates, locking openings are formed in the positions, corresponding to the top protrusions, of the sleeve box, and when the inner box is contained in the sleeve cavity of the sleeve box, the top protrusions are inserted into the locking openings. The packaging box can gradually adapt to the size of a product, the product can be placed more compactly, the concave-convex face of the partition plate is adopted as the clamping face, effective clamping force is guaranteed, anti-falling buffering protection is provided, the situation that the whole packaging box is completely attached to the side face of the product can be avoided, more product appearances can be shown, and therefore brand-new product packaging experience is provided. In addition, due to the design of the top protrusion and the lock opening, the function of a child lock can be achieved.