The utility model relates to an adjustable tray for loading and unloading food. The tray is mainly composed of an outer shell, a connecting plate body and a sealing cover structure. The outer shell is of a non-lifting structure, a connecting plate body is movably arranged in the outer shell, and limiting grooves are integrally connected with the two sides of the connecting plate body. The ends, close to the outer shell, of the connecting plate body and the sealing cover structure are fixedly connected with sliding limiting rods corresponding to the limiting grooves, and clamping grooves corresponding to the limiting grooves in the connecting plate body are further formed in the outer shell. The sealing cover structure comprises a movable plate and a sealing plate, the middle section of the movable plate is fixedly connected with the sliding limiting rod, a notch is formed in the end, close to the connecting plate body, of the movable plate, and a slope is arranged at an opening in the end, close to the connecting plate body, of the outer shell. When food needs to be unloaded, the sliding limiting rod is pulled out, the connecting plate body rotates around the inclined face to serve as a conveying track, meanwhile, the movable plate in the sealing cover structure rotates to be perpendicular to the ground through the notch, the sealing plate serves as a support, an inclined channel is formed, and fast unloading of the food is achieved.