The invention is applicable for the technical field of electronic equipment, and provides a circuit board assembly and electronic equipment. The circuit board assembly comprises at least one pair of connecting units, and each pair of connecting units comprises a first circuit board, a second circuit board and a third circuit board. The third circuit board is a rigid circuit board, bonding pads arearranged in areas at two opposite ends of the third circuit board respectively, and the bonding pads at the two ends of the third circuit board are welded with bonding pads on the first circuit boardand the second circuit board respectively. Compared with the fact that the two circuit boards are connected by adopting an FPC in the prior art, the third circuit board in the embodiment is unlikelyto age and long in service life, so that the service cycle of the product is guaranteed; and the third circuit board is simple in structure and convenient in installation. Moreover, a BTB connecting base is not needed, so that the cost is reduced.