The utility model relates to a railway cable laying supporting?facility, concretely relates to curved groove with SMC is connected to cable duct, including the curved groove cell body of bending the groove capping with be used for holding the cable, curved groove capping is used for covering the upper portion opening of curved groove cell body, curved groove cell body is including curved groove body and cover the establish section of setting at curved groove body both ends, curved groove cell body is provided with a groove of having a perfect understanding two cover sections of establishing, the groove is established for the cover in groove in that the cover section of establishing forms, the groove that forms at curved groove body is the spread groove, the spread groove extends along the curve, the cover section of establishing is established with the cable duct cover and is connected, can prevent effectively that the dislocation from appearing in curved groove and cable duct, improve the holistic intensity after curved groove and spread groove are connected, reduced to scrape because of the junction dislocation between curved groove and the cable duct by a wide margin and decreased the cable skin, make the cable buckle and the risk such as expose, can more effective protection?of?cables.