The utility model relates to a concrete construction and watering field, especially an assembled passageway is used in board concrete regularization watering, including movable scaffold step board, two the same first split headss, second split heads and movable scaffold step board both ends respectively some overlap joints detain, the whole galvanized steel pipe weld forming who adopts Phi 32 of split heads passes through the overlap joint according to construction needs and buckles the overlap joint that waters the passageway with the overlap joint completion of split heads support longeron.The utility model provides a split heads leg is directly taken in the backup pad through the interval of reinforcing bar net, can not cause the influence to the reinforcing bar layer of having pricked, constructor through the time can effectively prevent board upper strata muscle, the negative reinforcement causes tramples, quality problems such as distortion, to the floor slab rebar layer playinga fine guard action, the engineering quality is guaranteed, the present invention has simple structure, thereby facilitating mounting and detachment, the component is lighter, the dual -installationsupport is convenient for transportation, can have enough to meet the need the use for a long time, can improve the stability of construction, simplify the construction degree of difficulty.