Slider chair is located under the switch rail and stock rail components in the turnout, it support the switch rail and clamp the stock rail within the range of the switch rail. Slider chair is the key equipment, its normal operation is directly related to the operation safety. As common diseases, welding-off of sliding plate and baseboard, fracture of the slider chair, it has been the focus and difficulty of the maintenance work in the turnout area for a long time. Developed a new type of integral casting slider chair in order to thoroughly solve the problem of the disease of the slider chair. The optimization design of the slider chair, including manufacturing process, material optimization, increasing the width of the tongue of slider chair and the radius of the tongue’s root were introduced in this paper. The on-line test section is carried out after the excellent mechanical properties of the slider chair were verified by theoretical analysis and ultimate failure strength test. The successful development and application of the new integral casting slider chair is of great significance for the radical cure of the slider chair disease in the turnout.