Drainage type cable trench drainage device convenient to install and maintain

The utility model relates to the technical field of drainage devices, in particular to a drainage type cable trench drainage device convenient to install and maintain, which comprises a cable trench, a drainage groove and a drainage cover plate. Cable racks are fixedly arranged on two inner side walls of the cable trench; drainage grooves are formed in the side walls on the two sides of the cable trench; the drainage cover plate is horizontally laid on the cable trench and comprises a side wing plate, a connecting plate, a rear inclined plate, a front inclined plate and a rear wing plate. The side wing plates are attached to the inner side walls of the drainage grooves. The connecting plate is laid on the cable trench and two ends of the connecting plate are fixedly connected with the side wing plates; the rear inclined plate is obliquely and fixedly arranged at one end of the connecting plate; the front inclined plate is obliquely and fixedly arranged at the other end of the connecting plate; the waterproof