Online automatic rectifying device of symmetrically-open cold-rolled profile

The invention discloses an online automatic rectifying device of a symmetrically-open cold-rolled profile, and belongs to the technical field of cold roll forming devices. The online automatic rectifying device is characterized by comprising straightening devices which are distributed in a bilateral symmetry mode or in a staggered mode; each straightening device is mainly composed of a transverse sliding seat and straightening rollers fixed to the transverse sliding seat; and the straightening rollers comprise the vertical roller, the inner straightening roller and the outer straightening roller which are sequentially arranged on the outer side, the inner side and the outer side of a unilateral vertical plate of the cold-rolled profile in the feeding direction and are in rolling fit with the unilateral vertical plate. According to the online automatic rectifying device, the number of dies is small, the integration degree is high, the occupied space is small, energy consumption is low, servo stepless automatic