The utility model discloses a plate-rib-type continuous channel beam. The plate-rib-type continuous channel beam comprises a bottom plate, wherein two web plates are vertically arranged on the surface of the bottom plate along the length direction of the bottom plate and are positioned on the two sides of the bottom plate; a top plate is arranged on the top surface of each web plate; each web plate is connected with the middle part of the corresponding top plate; a plurality of first rib plates and second rib plates are arranged between the bottom surface of each top plate and the surface of the bottom plate at intervals; the first rib plates and the second rib plates are positioned on the two sides of each web plate; a partition plate is also arranged on the bottom plate; the center of the partition plate is overlapped with the center of a supporting seat. Each web plate is combined with the rib plates positioned on the two sides of the web plate, the web plates and the rib plates share a torque together, the torsional performance of a cross section is enhanced, and the plate-rib-type continuous channel beam can be applied to a continuous channel beam with a lager span; the transverse width only needs to meet the requirements of a train and a basic maintenance clearance; a refuge platform, a contact network foundation and the like can be placed on the inner side of the rib plates; the transverse width is not required to be increased additionally; the transverse width of the cross section is smaller on the premise of meeting the requirement of torque resistance of the cross section; moreover, the plate-rib-type continuous channel beam has an open cross section and is convenient to construct.