The invention discloses a panel furniture fast connecting piece which comprises an A-type fast connecting piece body. The A-type fast connecting piece body comprises a vertical plate block, a clamping groove is formed among the left side of the vertical plate block and transverse plate blocks at the two ends of the vertical plate block, a protruding trapezoid fixing block is arranged on the right side of the vertical plate block, a B-type fast connecting piece body is further included, and comprises a trapezoid clamping groove, the two fast connecting piece bodies are used in cooperation and used for connecting two perpendicular plates, and in the use process, the head end of one plate is clamped in the clamping groove, the trapezoid fixing block is clamped and buckled in the trapezoid clamping groove, and the B-type fast connecting piece body is fixed to the other plate. The panel furniture fast connecting piece is a novel concept and a novel mode for furniture manufacturing and using, in the furniture production process, time and labor are not consumed any more, the structural process is not complex any more, any person can manufacture and assemble furniture, perceptual intuition and understandability are achieved, people does not need to learn, and the panel furniture fast connecting piece has the advantages of being simple, firm and attractive in structure, and capable of flexibly changing the internal layout of the furniture and manufacturing the assembled furniture.