The invention relates to a 5G communication terminal device which is flexible in structure and convenient to use. The device comprises a main body, a supporting mechanism, a display mechanism and twowiring mechanisms. A plurality of keys are arranged on one side of the main body. The display mechanism comprises an opening, a sliding plate, a display plate, a sealing plate, two sliding rails and two sealing assemblies. The sealing assembly comprises a vertical rod, a lantern ring and a supporting plate. The wiring mechanism comprises a top plate, a bottom plate, a fixing shaft, a sleeve, a wiring board and a fixing assembly. According to the 5G communication terminal device which is flexible in structure and convenient to use, the wiring board can be conveniently rotated to a position parallel to one side of the main body where the key is located through the wiring mechanism. Moreover, after the device is used, the display plate can be contained in the opening through the display mechanism, the display plate can be protected against damage. Meanwhile, the keys are separated from the display plate, enough gaps are formed between the keys, misoperation is avoided, the device is moreconvenient to use, and therefore the practicability of the device is improved.