Building construction pay-off equipment capable of stretching out and drawing back automatically

The invention relates to pay-off equipment, in particular to building construction pay-off equipment capable of automatically stretching out and drawing back. According to the building construction pay-off equipment capable of automatically stretching out and drawing back, the pay-off height can be adjusted. Building construction paying-off equipment capable of stretching out and drawing back automatically comprises a workbench, a paying-off part, a rolling shaft, a first sliding rail, a guiding mechanism and a paying-off mechanism, the paying-off part is arranged at the top of the workbench, the rolling shaft used for taking up and paying off is rotationally arranged on the upper portion of the paying-off part, and the first sliding rail is arranged on the right side of the middle of the paying-off part; a guide mechanism for guiding take-up and pay-off is connected between the workbench and the pay-off part, and a pay-off mechanism for adjusting the pay-off height is arranged on the first sliding rail. The