The invention belongs to the technical field of coal mine underground dedusting equipment, in particular relates to a heading machine-mounted foam dedusting system, aiming at solving the problems of the traditional heading machine dedusting measure. The heading machine-mounted foam dedusting system comprises a cutting head arranged on the heading machine and a plurality of foam generators arranged above a tail scraper machine, wherein each foam generator comprises a case, the interior of the case is provided with a nozzle connected with a liquid source used for generating foams, and the interior of the case is provided with a foaming screen in front of the outlet of the nozzle. The heading machine-mounted foaming dedusting system disclosed by the invention has the beneficial effects that: dedusting efficiency is 2-5 times higher than the dedusting efficiency of the conventional atomizing and watering manner, and water consumption is reduced by 70-80%, thus the heading machine-mounted foam dedusting system is applicable to most roadways headed by a machine; and meanwhile, the heading machine-mounted foam dedusting system has the characteristics of small volume, low cost, flexibility and convenience, and is applicable to most service environments because the arrangement of the system can not be influenced even in a place with a narrow section.