Building construction line chuck

The utility model discloses a building construction wire chuck which comprises a supporting bottom plate, two sets of fixing plates, a pay-off assembly and an auxiliary assembly, the two sets of fixing plates are symmetrically installed on the two sides of the top end of the supporting bottom plate through bolts, and the pay-off assembly is installed between the fixing plates. According to the pay-off device, the pay-off assembly is arranged, the pay-off wheel is placed between the clamping disc and the auxiliary disc, the first motor is used for driving the transmission lead screw to rotate, the transmission lead screw rotates to drive the multiple sets of lead screw nuts to be close to or away from one another, the lead screw nuts move to drive the supporting plate to move, and the pay-off wheel can be limited, clamped and fixed; the pay-off wheels of different sizes can be limited and clamped conveniently, multiple sets of pay-off wheels are arranged to pay off multiple strands of cables at the same time,