The invention relates to an adiponitrile production system which comprises an adipic acid storage tank, a mixer, an adipic acid ammoniation reactor, a cyanation reactor, a separation tower, an ammoniagas cooler, an ammonia gas decarburization tower, a circulating ammonia gas dehydrator and a liquid ring compressor. The adipic acid storage tank is connected to the mixer by a pipeline, a branch fordelivering liquid phosphoric acid is arranged on the pipeline, the mixer is connected to an inlet of the adipic acid ammoniation reactor, an ammonia gas inlet and adipic acid ammoniation product andammonia gas outlets are further formed in the adipic acid ammoniation reactor, the adipic acid ammoniation product and ammonia gas outlets are connected with the cyanation reactor by pipelines, and the cyanation reactor is connected to the separation tower. The adiponitrile production system has the advantage that the shortcomings of decomposition and condensation coking of adipic acid in existingproduction routes at the high temperatures and the like can be overcome by the aid of the adiponitrile production system.