The invention relates to a rubber movable cofferdam and a processing technology thereof, and belongs to the technical field of rubber movable cofferdam and the processing technology thereof. The rubber movable cofferdam comprises a cofferdam body which is of a hollow structure, wherein a plurality of water filling ports and exhaust ports are formed in the cofferdam body; end heads used for field fixing are arranged in the bottom length direction of the cofferdam body; the end heads and the cofferdam body are in an integrated structure; and the left end and the right end of the cofferdam body are vulcanized and blocked by folding adhesive tapes II. The rubber movable cofferdam has simple structure, good water blocking effect, high safety factor, low cost and simple operation, and can be installed and constructed on water.