The utility model discloses a super-thick steel plate wall in a truss joint area. The super-thick steel plate wall comprises a first penetrating wall plate, a second penetrating plate wall, a corner wall plate unit and at least two transverse partitions. The first penetrating wall plate is parallel to the second penetrating wall. The first penetrating wall plate and the second penetrating wall plate are supported and fixed to form a penetrating wall pate unit through the at least two transverse partitions. One end of the penetrating wall plate unit is fixedly welded to one end of the corner wall plate unit to form a corner shaped combined wall plate structure. The super-thick steel plate wall in the truss joint area has the advantages that bearing capacity of the wall is guaranteed, the structure is simplified maximally, raw materials are saved, investment is saved, structural seismic resistance is enhanced, welding difficulty and labor are reduced, construction is facilitated, expenditure on construction measures is reduced, and construction period is shortened.