The invention discloses an intelligent straightening device for building steel wires, and belongs to the intelligent field of civil construction. The intelligent straightening device comprises an intelligent straightening device main body, wherein the intelligent straightening device main body comprises a traction module, a straightening module and a main control module; the traction module comprises traction wheels, traction regulating valves, a left inching button, a right inching button, a pressure display meter I, a pressure sensor I, a traction controller, a traction motor, an anti-swing wheel and a traction table; the straightening module comprises front-stage straightening wheels, rear-stage stable wheels, a straightening regulating valve, a fixed valve, a straightening controller, a straightening motor, a pressure sensor II, a pressure display meter II and a straightening table; the main control module comprises a main controller; and the front surface of the main controller is equipped with a touch screen and a selecting key. According to the test results, the motor control is stable, diameter range of the straightened steel wires can be increased, the device is intelligent, manpower and material resources are saved, steel resources are saved, and therefore, the intelligent straightening device is suitable for being popularized and used in the building industry.