The utility model discloses an utilize sluicing hole to block and float device of wood, including establishing in open channel (2) of sluicing hole (1) entrance, open channel (2) both sides are equipped with floats wood and stops become silted up (3), and open channel (2) top is equipped with the beam slab of blocking (4), and the beam slab of blocking (4) front end is the toper, it returns groove (5) to be equipped with the arc at the entry of open channel (2). The utility model discloses an increase the devices of the trees of blocking of sluicing hole open channel section, make trees be detained floating in wood stops becoming silted up, make things convenient for the desilting simultaneously, prevent to cause the sluicing hole to block up, influence the sluicing hole and lead the effect to the row of mud -rock flow. The utility model discloses obtain the effect that is showing with less input, had extensive popularization meaning.