According to the production practice of multi-section billet caster, from the point of view of process and equipment design and production practice, the following ideas are put forward. The total length of the secondary cooling zone is 7 685 mm and divided into four zones, and the fourth zone is refined into the fourth zone + the extension zone of the fourth zone to adapt to the production of multi-section and multi-steel with higher casting speed. The distribution ratio of the secondary cooling zone is 0.33-0.39-0.19-0.09 (the extension zone of the fourth zone is closed) and 0.35-0.39-0.12-0.14 (the extension zone of the fourth zone is opened) and the water ratio ranges from 0.3 to 1.2 L/kg. The unique quick change assembly of complete wanter and mist nozzle for secondary cooling can save section change time up to 2.5 h. The best installation position of final electromagnetic stirring of each sectional production is 9.2 m from the meniscus. The full leaf spring hydraulic vibration and continuous straightening technology are adopted. The multi-section billet caster designed according to the above ideas can achieve high casting speed, good quality billet, high operation rate of continuous caster, and provide practical experience for the transformation or design of the same type of continuous caster.