The invention provides a base tray and a membrane frame for a large-scale column type ultra-filtration membrane. A set of positioning slots are formed at the upper end of the base tray; the positioning slots are symmetric to each other about a central line of the upper surface of the base tray; the positioning slots are arranged as arc-shaped slots; all the positioning slots are located on the circumference of the same circle; and the positioning slots respectively perforate through the front wall and the rear wall of the base tray. The base tray and the membrane frame for the large-scale column type ultra-filtration membrane provided by the invention can be used for simply and reliably fixing a column type membrane component; a membrane component cover is directly in grafting fit with the base tray; under the condition of guaranteeing reliable supporting and positioning effects of the base tray on the column type membrane component, the mounting process is simplified and the maintenance efficiency is increased; and meanwhile, the base tray has a small and exquisite structure and low cost and is conveniently fixed with the membrane frame.