The invention relates to the technical field of advertisement propaganda, and provides an advertising light box, comprising a backboard, a lamp cloth, a plurality of frame side strips and a lamp bodyfixing assembly. The lamp cloth has a lamp cloth body and an insertion strip arranged at the edge of the lamp cloth body. A plurality of frame side strips are sequentially connected end to end and enclosed to form an enclosed space for mounting the backboard and the lamp cloth, the frame side strips are formed with a lamp cloth groove for inserting the insertion strips on a first side thereof, theframe side strips are provided with a mounting portion and a protruding portion on a second side thereof, and mounting grooves for fixing the backboard are formed between the protruding portion and the mounting portion. The lamp body fixing assembly is arranged on the back plate and comprises a lamp body inserting plate, a luminous body, a mounting strip and a snap-on structure, wherein the snap-on structure is arranged on the mounting strip and is used for fixing the lamp body inserting plate. The two ends of the lamp body insertion board respectively abut against the two frame side strips.The structure makes the lamp cloth convenient to disassemble and assemble, reliable to fix, convenient to maintain and low in maintenance cost. At that same time, a plurality of frame side strip are fixed on the back plate at the same time, the movement and deflection of the back plate are effectively limit, and the structural stability is good.