Processing system of fireproof cable layer

Relates to a processing system of a fireproof cable layer in the technical field of cable processing. The processing system comprises an extruder, a shaping device, a first traction device and a hot-pressing edge sealing machine which are arranged in sequence, the extruder comprises an extrusion die head, and the cross section of the primary cable layer comprises four arc edge parts and four V-shaped corner parts which are uniformly and annularly distributed; the shaping device comprises a shaping channel of which a front port and a rear port are correspondingly communicated, and the front port and the rear port are respectively matched with the outer wall surfaces of the primary cable layer and the inner flame-retardant cable layer, so that the primary cable layer can be shaped into the shape of the inner flame-retardant cable layer after passing through the shaping channel; the first traction device comprises two traction roller sets symmetrically arranged on the two sides of the inner flame-retardant cable