This paper introduces a calculation method for the moving trajectory of singlerail ropewheeled glass lifter，analyzes its influence on auto glass jacking system，expounds the stress balance and moment balance of the jacking system by the combination of theoretical calculation and practical examples to simulate the moving trajectory of singlerail ropewheeled glass elevator，and further analyzes the impact of the moving trajectory on the jacking system. This calculation method，with simple and practical advantage and with strong guiding significance，provides theoretical basis for the determination of the moving trajectory of singlerail ropewheeled glass lifter.