The invention discloses a wooden box bottom plate supporting device. The wooden box bottom plate supporting device comprises supporting plates; the upper surfaces of the supporting plates are fixedlyconnected with a plurality of cushion blocks; a moving cavity is formed in each of the centres of the cushion blocks which are positioned on two sides; the centre of each moving cavity is fixedly connected with a limiting block; each of the two sides of each limiting block are fixedly connected with a fixing buckle; each fixing buckle is fixedly connected with a spring; one end, far away from thefixing buckle, of each spring is fixedly connected with the side surface of an inserting block; and the top of each inserting block is fixedly connected with a supporting block. According to the wooden box bottom plate supporting device, objects with different sizes can be conveniently fixed through the springs and the supporting blocks, so that the situation that the size of the original wooden box is required to be adjusted again because an object is too small is avoided, and the cost is reduced; moreover, added baffle plates can prevent the supporting blocks from falling off because the object is too large, so that the safety is increased; and compared with the conventional wooden box supporting structure, the applicability is high, and the application range is wide.