The invention relates to a charging distributor and a flame-retardant nylon manufacturing device and method, and belongs to the technical field of manufacturing of nylon composites. The charging distributor comprises a distributing body and a supporting mechanism arranged on the distributing body. The supporting mechanism comprises supporting legs used for supporting the distributing body on the corresponding inner walls of a charging container and enabling material channels to be formed between the distributing body and the inner walls of the charging container. Each supporting leg is provided with a pushing end matched with the corresponding inner wall of the charging container in a pushing-fit mode. The charging distributor is characterized in that the supporting mechanism further comprises a positioning structure used for being inserted into a discharge outlet of the charging container to prevent the axis of the distributing body from deviating from the vertical direction. The charging distributor can be placed in a charging bin and is convenient to overhaul and replace, and the positioning structure is adopted, so that the distributor is prevented from deviating under material impact.