The utility model discloses a foldable billboard, it includes the field type billboard of compriseing four spuare metal boards, butt joint department of metal sheet is equipped with movable tripe, field type billboard passes through the plug bush at both ends and pegs graft fixedly each other with the landing leg seat. Because folding joint is carried out through the activity tripe to butt joint department of metal sheet, can fold four spuare metal boards and accomodate, can improve space utilization greatly, can hand -carry through the handle, it fixes to expand back accessible bolt to it can to fix with the grafting of landing leg seat through the plug bush.