The utility model discloses a board tube connector, include: connect the hollow tube and the drain bar connector of formula structure as an organic whole, hollow tube inside is provided with the elasticity cap of locating part, installation no. 1 of hollow tube open -top end and locating part counterbalance, the drain bar connector includes pivotally connected to's first plate body and second plate body, and the pivotal axis lies in the top of drain bar connector, and drain bar connector bottom is open structure, is provided with locking mechanical system on the both sides wall of drain bar connector in order to realize opening and shutting of first plate body and second plate body. Useful part lies in: the utility model discloses a board tube connector novel structure, design benefit set up the locating part in the hollow tube for drain pipe and board tube connector reliably link to each other and guarantee the leakproofness of junction, need not outer edge sealing glue and wait the material of guaranteeing the leakproofness, and be convenient laborsaving, the structure of drain bar connector is also improved, is convenient for directly open first plate body and second plate body and places drain bar, simple operation, labour saving and time saving.