Pay-off rack for house building construction

The utility model relates to the technical field of house building construction, in particular to a pay-off rack for house building construction, which comprises a base and two fixing rods respectively fixed on two sides of the outer wall of the top of the base. The supporting mechanism is used for supporting and fixing a cable reel, the supporting mechanism comprises supporting plates sliding on the circumferential outer wall of the fixing rod, arc-shaped grooves are formed in the tops of the outer walls of the opposite sides of the two supporting plates, the inner walls of the two arc-shaped grooves are slidably connected with the same bobbin, and rectangular grooves are formed in the outer walls of the tops of the supporting plates; the spring pushes the push rod to enable the clamping plate to be close to the spool, when the spool rotates, the spool and the clamping plate rub each other, the spool cannot rotate all the time due to inertia through friction force, and therefore the spool can be prevented fr