The invention provides a synthesis gas sensible heat recovery device, a synthesis gas sensible heat recovery method and a gasifier comprising the synthesis gas sensible heat recovery device. The synthesis gas sensible heat recovery device is provided with multiple stages of jet apparatuses; a low temperature region close to a heat exchange surface and a core high temperature region located in themiddle of the low temperature region are formed at the upstream of a radiation heat exchange chamber by means of the first jet apparatus, and hest exchange between the core high temperature region andthe heat exchange surface is realized in a radiation way, so that the heat exchange efficiency is effectively improved. Furthermore, the sensible heat recovery device provided by the invention is provided with the multiple stages of jet apparatuses so as to form a plurality of regions on the flow path of synthesis gas gasification, thus realizing zone control; in addition, the synthesis gas sensible heat recovery device is further provided with a river diversion ash removal structure, and the movement loci of ash particles with different particle sizes in the airflow are improved in a way ofguiding flow, so that the possibility of the movement of the large particle ash to the wall surface of an inner cylinder is reduced, and the entrainment amount of the small particle ash in the synthesis gas is reduced.