The invention discloses a practical LED wall lamp device. The device comprises a mounting base and an LED wall lamp, wherein the mounting base is arranged in a wall, and the LED wall lamp is connectedwith the mounting base in a matched mode; an inserting block is arranged in the middle of the right end face of the LED wall lamp, a power connecting block is arranged in the middle of the right endface of the inserting block, and a through groove is formed in the inserting block in an up-down communicating mode; and an inserting groove with a leftward opening is formed in the mounting base, a power supply hole is formed in the middle of the right end wall in the inserting groove, and a first sliding groove is formed in the part, below the inserting groove, in the mounting base. According tothe device, the structure is simple, running is safe and reliable, the operation is simple and convenient, the mounting and the dismounting efficiency of the LED wall lamp is high, an electric shockaccident caused when the LED wall lamp is mounted and dismounted is effectively avoided, locking plates are locked in positions through two elastic locking devices so that the inserting block can be locked in the inserting groove, so that the stability of mounting of the LED wall lamp is improved, the stability of electrifying of the LED wall lamp is improved, so that the device is suitable for popularization and use.