The invention provides a movable water control rack used in a laboratory and belongs to the technical field of laboratory equipment. By adoption of the movable water control rack, the problems that a vessel is used in the laboratory to control water, water control is not thorough, and a water control device is inconvenient to use and single in function are solved. Water control rack faces are fixed to square supporting columns, and the water control rack faces and the square supporting columns form a supporting frame. Multiple layers of fine column cross beams are arranged in the supporting frame from top to bottom. A water receiving square plate is arranged under each layer of fine column cross beams. Each layer of fine column cross beams is composed of a plurality of fine columns. Every two fine columns are not parallelly arranged. Each fine column is sleeved with soft plastic. The water receiving square plates are mounted on the square supporting columns through clamping grooves fixed to the square supporting columns and are obliquely held. The oblique lower portions of the water receiving square plates are provided with water outlets which communicate with a silica gel pipe. Universal wheels are mounted at the bottoms of the square supporting columns. By adoption of the movable water control rack used in the laboratory, the laboratory vessels, such as volumetric flasks, measuring cylinders and beakers, of various specifications can be held at the same time, and the water control effect is improved.