The invention relates to a multifunctional box falling test machine and aims to use automatic equipment such as a cylinder and the like to realize function of clamping a packaging box in multiple directions, and to finish release action after lifting the packaging box to a certain height. The principle is that: an execution component such as the cylinder is used to be connected with a well designed clamping mechanism to realize the function of clamping the packaging box in multiple directions, and a lifting motor is used to finish lifting action of the cylinder and the packaging box. After a predefined height is reached, the cylinder is ventilated reversely and the clamping mechanism is released, so that the packaging box can be subjected to free falling body test. The advantages are that: the mechanism is simple and practical; the clamping mechanism is lifted up and down by the lifting motor; and the packaging box is clamped by multiple angles through the simple clamping mechanism and can be automatically released at high altitude. In the process of use, if size of the packaging box has a change, size and type number of 4a, 5a or 8a also can be replaced, so that various situations can be adapted.