Advertising box facilitating replacement of display board

The utility model particularly relates to an advertising box convenient for replacing a display board, which comprises a box body, a base arranged on the lower surface of the box body, panels arranged on the front side surface and the rear side surface of the box body in an openable manner, a first roll shaft and a second roll shaft which are rotatably arranged at the upper part in the box body, and a third roll shaft and a transmission rod which are rotatably arranged at the lower part in the box body, a fourth roll shaft is arranged in the middle of the box body in an up-down sliding mode, and a motor is arranged at the bottom in the box body and drives a transmission rod to rotate; according to the utility model, a multi-layer surrounding structure is adopted, so that the length of a displayed picture can be prolonged, and the displayed picture can be conveniently tensioned; the display picture can be conveniently replaced, namely the display picture is sequentially wound around the first roller shaft, the