The invention is applied to the technical field of relays, and provides an assembly method of an integrated magnetic latching relay and the integrated magnetic latching relay made by using the method.Compared with the prior art, by changing the shape and size of a center hole in a mutual inductor, it can be achieved that one end, provided with a stationary contact, of a static piece is inserted into the mutual inductor, so that the assembly of the mutual inductor is convenient and fast; after the assembly of a stationary contact assembly is completed, the stationary contact assembly can be integrally arranged on a box body, thereby being conductive to the installation of the stationary contact assembly in narrow space, so that the magnetic latching relay has a compact structure and a small size; the end, provided with the stationary contact, of the static piece is inserted into the mutual inductor, so that a static piece terminal copper bar and the static piece are not limited in boltconnection, the diversification of the connection mode is achieved, the resistance of the junction of the static piece terminal copper bar and static piece can be effectively reduced, the temperaturerise is low, and the reliability of the connection between the static piece terminal copper bar and the static piece is improved.