Multi-dimensional adjustable backrest device

The utility model relates to the technical field of backrest devices, in particular to a multi-dimensional adjustable backrest device. The backrest device comprises a back plate, a left-right adjusting structure, two backrest plates and at least one height adjusting structure, buffering connecting parts are arranged on the rear sides of the backrest plates, two transverse sliding blocks of the left-right adjusting structure are arranged in transverse sliding grooves in a sliding mode, the transverse sliding blocks are connected with the buffering connecting parts, and vertical guiding parts of the height adjusting structures are arranged on the back plate. The vertical sliding part is slidably connected with the vertical guide part, the transverse sliding groove is connected with the vertical sliding part, left-right interval adjustment of the two backrest plates is achieved through the left-right adjusting structure, height adjustment of the two backrest plates is achieved through the height adjusting struct