Steel bar cutting machine for building construction

The utility model discloses a building construction steel bar cut-off machine, which relates to the technical field of building construction and comprises a bottom plate, a fixing frame, a telescopic piece, a connecting plate, a connecting sleeve, a driving rod, a driving piece, a cutting knife, a shielding mechanism, a fixing mechanism and a supporting mechanism. In the initial state, the shielding mechanism shields the cutting knife, and when the reinforcing steel bars need to be cut, the telescopic piece drives the connecting plate to move longitudinally, the connecting plate drives the connecting sleeve to move longitudinally, the connecting sleeve drives the driving rod to move longitudinally, and meanwhile the shielding mechanism is unfolded. The driving piece drives the driving rod to rotate, the driving rod drives the cutting knife to rotate, and the cutting knife cuts the reinforcing steel bars, so that the problems that most of the cutting knives on the reinforcing steel bar cutting machine in the p