The utility model relates to a wiring groove box for fixing a communication cable. the groove box comprises a groove box body (3) with a U-shaped cross section, at least two cables (1) are laid at thebottom of the inner wall of the groove box body (3). A groove box wire outlet (7) is formed in the middle of one side face of the inner wall of the groove box body (3), the bottoms of the inner wallof the groove box body (3) on the two sides of the groove box wire outlet (7) are each provided with a cable fixing transverse rod (6), and at least one end of each cable fixing transverse rod (6) isdetachably installed at the bottom of the inner wall of the groove box body (3) to press all cables (1). Trials prove that after the wiring groove box is adopted, tail fibers, tail cables, coaxial cables, network cables and other weak current cables in the groove box can be bundled and fixed, maintenance is convenient, and the standard construction process level of communication cables in a machine room is effectively improved while it is ensured that all kinds of communication cables in the groove box operate safely and stably through the process.