Construction pay-off device for building

The utility model relates to the technical field of pay-off equipment. The utility model relates to a pay-off device, in particular to a building construction pay-off device. The right side wheel andthe left side wheel rotate; box body is more convenient to move, box body moving speed is higher, meanwhile, the speed of the wire on the wire wheel extending to the outside through the pay-off opening is close to the advancing speed of the right side wheel, so that the tension of the wire body is reduced in the pay-off work, the risk of breaking the wire is reduced, the movement of the right sidewheel and the take-up work of the wire wheel are synchronously carried out in the take-up process, and the working efficiency, the practicability and the reliability are improved; the device comprises a box body, a first rolling shaft, a first fixing block, a second fixing block and a wire wheel, a cavity is formed in the box body, the front end of the cavity is provided with a pay-off port in acommunicating mode, the fir