The invention discloses a wave-form opening device of a large weaving system. The device comprises n independently driven electronic jacquard machines which uniformly divide all warps into n regions a wefting insertion path direction uniformly; each of the electronic jacquard machines is arranged above the warps in the corresponding region and is connected to the warps in the corresponding region through mounting of harness cords; one electronic jacquard machine is gradually driven to an opening state according to a sequence number during weaving while the other electronic jacquard machines are in shed leveling states, thereby forming a wave-form shed for a weft carrier to move; the speed of the wave-form shed moving from the region 1 in sequence to the region n is synchronized to the moving speed of the weft carrier. The warps are in high-tension and high-elongation opening states in the wave peaks and are in non-elongation shed leveling states in almost time, so that the warps are powerfully protected. For the weaving system where the weft carrier does a circular motion, the device provided by the invention can be used for solving the problem of continuous wefting insertion well, and the weft carrier can do spiral wefting insertion movement without a break, so that the efficiency is increased.