The invention discloses a mailbox device convenient to assemble and disassemble. The mailbox device includes a mailbox body and a plurality of drawer boxes, wherein the drawer boxes are arranged in the mailbox body and can be drawn out outwards; a mounting frame is also arranged on the top of the mailbox body, and an illuminating lamp is matched with the mounting frame; a socket groove is formed in the left end face of the mounting frame, a power conducting groove is formed in the right end of the socket groove, a first sliding connection groove communicated with the socket groove is formed inthe bottom of the socket groove, a second sliding connection groove is formed in the portion, above the socket groove, inside the mounting frame, a transition groove is formed in the portion, at theright end of the socket groove, inside the mounting frame, a drive part is arranged in the transition groove, and a sliding connection frame capable of moving left and right is arranged in the socketgroove. The mailbox device convenient to assemble and disassemble is simple in structure, low in production cost and safe and stable in power supply and can effectively and completely eradicate electric shock accidents in current life, the assembly and disassembly steps of the illuminating lamp are convenient, and the usage requirements of the illuminating lamp in the mailbox body are met.