The invention discloses a rebar planting-free formwork erecting method for masonry construction and a device thereof. The method comprises the following steps of: building a single-skin masonry against a wall or a column steel bar before pouring concrete, arranging a lacing bar in a masonry mortar joint, sealing the single-skin masonry, the lacing bar, the wall or the column steel bar by using a rebar planting-free formwork erecting device in the masonry construction and the timber formwork of the concrete wall or concrete column, fixing the formwork erecting device by using an opposite-pull screw to form an integral combined sealing formwork system, and completing concrete pouring, wherein the rebar planting-free formwork erecting device in the masonry construction is in a U shape, a lacing bar through hole is formed on a front board of the formwork erecting device, and opposite-pull screw through holes are formed on two lateral boards of the formwork erecting device. When the method and the device of the invention are used, the problems of timber formwork loss, lacing bar offset and the like in the conventional method for arranging the lacing bar can be solved, later-period rebar planting is avoided in the integral pouring construction, and the earthquake resistant performance of buildings is improved.