The invention provides a binding-free connection node positioning device, a binding-free connection node connection structure and a construction method of the binding-free connection node positioningdevice. The device comprises a positioning plate; the positioning plate is provided with upper side positioning structures and lower side positioning structures. The connecting structure comprises a ring rib A on a component A and a ring rib B on a component B; upper side longitudinal reinforcing steel bars and lower side longitudinal reinforcing steel bars pass through the interiors of the ring rib A and the ring rib B; a positioning plat is arranged between the upper side longitudinal reinforcing steel bars and the lower side longitudinal reinforcing steel bars; the upper side positioning structures and the lower side positioning structures of the positioning plate are arranged on the positioning plate; and the longitudinal reinforcing steel bars are matched with the positioning structures. The construction method includes the following steps that: the ring rib A of the component A falls into the ring rib B of the component B; the upper side longitudinal reinforcing steel bars and the lower side longitudinal reinforcing steel bars pass through the ring rib A and the ring rib B; the upper side longitudinal reinforcing steel bars and the lower side longitudinal reinforcing steel bars are matched with the upper side positioning structures and the lower positioning structures of the positioning plate; and concrete is poured. According to the binding-free connection node positioning device, the binding-free connection node connection structure and the construction method of the binding-free connection node positioning device of the invention, based on the lower side longitudinal reinforcing steel bars, the upper side longitudinal reinforcing steel bars are positioned and supported through the positioning plate, and therefore, the fast and accurate positioning of the longitudinal reinforcing steel bars can be ensured.