The invention provides a production system of chlorinated polyethylene, belonging to the technical field of chemical equipment. The production system comprises a reaction kettle for chlorination reaction, a water washing kettle for water washing deacidification, a primary centrifuge, a homogenizing pot for soaking deacidification, a secondary centrifuge and a fluidized drying bed connected sequentially, wherein the reaction kettle, water washing kettle, homogenizing pot and fluidized drying bed are internally lined with acid proof inner liners; and the inside parts, in contact with materials, of both the primary centrifuge and secondary centrifuge are made of acid proof materials. Due to arrangement of a hydrochloric acid storage tank and line development, switchover between an acid phase process and a water phase process of the system is realized. By adoption of the production system, total water consumption can be reduced, the production cycle can be shortened, thus the production cost is lowered, and the byproduct hydrochloric acid can be treated flexibly.