The invention provides an assembled concrete component reinforcement magnetic suspension connecting and positioning device which is used for positioning an upper concrete component and a lower concrete component, so that upper and lower reinforcements to be connected are in coaxial butt joint. The device comprises a control mechanism, at least two groups of support mechanisms, a positioning mechanism and a support mechanism, the supporting mechanism comprises a lower support and an upper support, the upper support comprises a support plate and a limit plate, both the support plate and the lower support are electromagnets, like magnetic poles of the support plate and the lower support are oppositely placed, the positioning mechanism comprises a first mark and a second mark which are arranged at corresponding positions of assembly surfaces of the upper concrete component and the lower concrete component, the lower support is placed at the first mark, the upper support is placed at the second mark, coils in the support plate and the lower support are serially connected onto the same circuit, the support mechanisms can be the same in magnetic force, support stability is ensured, and the control mechanism is used for controlling the magnetic force of the electromagnets. By the aid of the principle of magnetic suspension, the reinforcements of the upper concrete component and the lower concrete component are rapidly and accurately centered.