The utility model belongs to the technical field of the technique of container and specifically relates to a container convenient to hinge is changed in maintenance, has two preceding corner piece and two back corner piece, two back corner piece's outer edge all is provided with outer gatepost, and all perpendicularly upwards extend at two back corner piece's middle part has men fangguan, and two menfangguan's inboard all is connected with the door plant, and every menfangguan's rear side is all articulated to have a plurality of blocks of flaps, all inwards bends in the rear end of two outer gateposts, on two outer gateposts all the welding have a plurality of auricle, whenever two adjacent auricles all weld within a definite time has the pin that passes corresponding flap. Under the prerequisite that does not reduce door opening width, outer gatepost changes the back, and the flap can independently be installed and change, facilitates the use and later maintenance.