The utility model discloses a T-shaped assembling part for plates and overcomes the defect of high cost brought about by application of a C-H-shaped keel to assemble the plates in places where existing construction operations and the like are limited. The T-shaped assembling part comprises a fixing portion (1), a first clamping portion (2) and a second clamping portion (3), wherein an angle between first surfaces of the first clamping portion (2) and the fixing portion (1) is smaller than or equal to 90 degrees, and an angle between second surfaces of the second clamping portion (3) and the fixing portion (1) is smaller than or equal to 90 degrees. The T-shaped assembling set can well replace the C-H-shaped keel to have the plates of various fixed specifications assembled in limited places, and the problem of existing inconvenience in assembling the plates is solved.