In order to satisfy the construction need of the 750 kV transmission and transformation project for the connection of Nowthwest grid and Xinjiang grid, the rigid jumper of quadri-split conductors in 750 kV transmission line was studied. The type of sub-conductor was determined through the theoretical calculation of jumper's electric field strength, and the parameters of the jumper system were given based on results of wind yaw angle calculation. Then, this paper developed the complete fittings for the engineering requirements, such as the 'four to six' converter of jumper, strengthened anti-Wear type spacer, et al. Through the testing and identification, it is shown that the jumper system of 750 kV quadri-split conductors can meet the engineering requirements.