The production method and a kind of alpha-olefin production system of a kind of alpha-olefin

The invention discloses a kind of production method of alpha-olefin and production system, the production method is included under the conditions of steam reforming reaction, and methane is contacted with water, obtains steam reforming synthesis gas；Under dry reforming reaction condition, by methane and carbon dioxide exposure, dry reforming synthesis gas is obtained；Steam reforming synthesis gas and dry reforming synthesis gas are mixed, Fischer-Tropsch synthesis charging is obtained to prepare, Fischer-Tropsch synthesis charging is contacted under the reaction temperature of production alpha-olefin with fischer-tropsch synthetic catalyst, obtain Fischer-Tropsch synthetic logistics, isolate the methane and carbon dioxide in Fischer-Tropsch synthetic logistics, methane is sent into steam reforming step and/or dry reforming step, carbon dioxide is sent into dry reforming step.The production method of alpha-olefin according to the present invention can be effectively reduced the discharge capacity of system energy consumption and greenhouse gases (such as carbon dioxide).