Double-circulation jet reactor

The utility model provides a double-circulation jet reactor which comprises a first-stage reaction kettle (4) with an ejector, a second-stage reaction kettle (3) with an ejector, circulation pumps, connecting pipelines, a raw material storage tank and product outlet pipes, wherein jet-type Venturi ejectors are mounted at the upper parts of the reaction kettles with the ejectors; the ejector (1) corresponds to the second-stage reaction kettle (3); and the ejector (2) corresponds to the second-stage reaction kettle (4). Liquid materials enter the tops of the ejectors and gas materials enter the side surfaces of the ejectors; product outlets are arranged at the lower parts of the reaction kettles, connected to the inlet pipes of the circulation pumps and connected to the top inlets of the ejectors of the reaction kettles; and the gas and liquid reaction can be more fully proceeded through a double-circulation jet reaction system.