Multi position parallel reactor is an upgraded and integrated product of the basic model, greatly saving laboratory space resources. This reactor is mainly used for laboratory parallel experiments, constant variable comparative analysis experiments, and so on. Suitable for various fields such as petroleum, chemical, pharmaceutical, materials, metallurgy, etc. Specific examples include catalytic reactions, polymerization reactions, supercritical reactions, high-temperature and high-pressure synthesis, hydrogenation reactions, etc. There are mainly three types of multi position parallel reaction kettles: A, B, and C