Preparation device of multi-core flame-retardant cable

The invention provides a preparation device of a multi-core flame-retardant cable. The preparation device comprises a smearing mechanism, a wire changing mechanism and a U-shaped frame, the smearing mechanism and the wire changing mechanism are both installed in the U-shaped frame, and the U-shaped frame is installed on the top of the walking guide rail in a sliding mode. A flame retardant supply box is installed at the bottom in the guide box, a smearing area and a shaping area are arranged at the top in the guide box, a smearing ring is installed in the smearing area, the inner wall of the smearing ring is of a mesh structure, the smearing ring communicates with the flame retardant supply box, and an air cooler is installed in the shaping area. The flame retardant can form a flame-retardant barrier outside the stranded cable core, the stranding strength between the cables can be improved, and looseness is avoided; a flame-retardant cable twisting production method is designed, so that the flame retardant ca