The invention relates to the technical field of flowerpot trays, in particular to a form-convertible flowerpot tray with an adjusting function. The flowerpot tray comprises a bottom plate, three supporting legs are mounted on the lower surface of the bottom plate, first sliding grooves are formed at the front, rear, left and right sides of the lower surface of the bottom plate, and first sliding blocks are mounted in the first sliding grooves; and a first limiting hole is formed at the top of each first sliding groove, a limiting rod is installed on the upper surface of each first sliding block, the limiting rods are located in the first limiting holes, a fixing frame is installed on the upper surfaces of the limiting rods, four telescopic rods are installed on the upper surface of the bottom plate, and a tray body is installed at the ends, away from the bottom plate, of the four telescopic rods. According to the flowerpot tray, through mutual cooperation of structures, water drainageis facilitated, the height of a flowerpot can be adjusted, the flowerpot tray can be changed into a hanging form, the practicability of the flowerpot tray is improved, people can use the flowerpot tray conveniently, and growth of plants in the flowerpot is facilitated.