The invention discloses a deeper water jacket super slender ratio drill conductor marine installation technology.The deeper water jacket super slender ratio drill conductor marine installation technology comprises the following installation steps that step 1,a second hoisting sling is mounted on the superslender ratio drill conductor; step 2,a first hoisting sling is assembled and connected on thesuper slender ratio drill conductor; step 3,a floating hoist is used for straightening the superslender ratiodrill conductor; step 4,a floating crane is used forsuspending the super slender ratiodrill conductor at a wellhead of the water jacket;step 5, the first hoisting sling hoisting mode is converted into an overall hoisting mode composed of the first hoisting sling and the second hoisting sling, and the superslender ratio mounted until free mud entering is realized; safe, stable, and reliable righting and installation of the superslender ratio drill conductor are realized, the length limit of the superslender ratio drill conductor is broken through, the section amount of the deeper water jacket drill conductoris decreased, the mud entering of a first section of the deeper water jacketdrill conductoris realized, and the suspension problem in the wellhead area is solved; and the operation is convenient, the engineering construction efficiency is improved, and the cost is lowered.