The invention discloses an openable groined frame guiding roller device. The device includes a guiding roller assembly, an openable arm, a gear transmission assembly, a power assembly and a gearbox; one end of a main shaft of the guiding roller assembly is fixedly connected with a kidney-shaped hole in one end of the openable arm; the other end of the openable arm is connected with gears of the gear transmission assembly and controlled by the power assembly to enable the openable arm to swing within an angle range from 0 to 180 degrees and drive the central axes of guiding rollers of the guiding roller assembly to switch between a closed phase and an open phase alternatively and separately; the gear transmission assembly is installed in the gearbox, and at least one gear is connected or meshed with the power assembly. The openable groined frame guiding roller device achieves automatic real-time avoidance of knotting, and is simple in structure, low in manufacturing cost, high in reliability and capable of reducing manual labor intensity and improving working efficiency.