The invention discloses a shielded low-
smoke and low-
toxicity signal cable for a subway, relating to the technical field of cable structures. The shielded low-
smoke and low-
toxicity signal cable comprises two groups of cable cores, wherein each group of cable cores comprises two cable cores, a segregation
grease band wrapped covering and a
branch shielding layer; each cable core comprises a conductor respectively; a
mica fire-resistant layer is wrapped outside the conductor; a
halogen-free and low-
smoke insulating layer is extruded outside the
mica fire-resistant layer in a wrapping manner; the segregation
grease band wrapped covering is formed on the peripheries of two cable cores; the
branch shielding layer is formed on the periphery of the segregation
grease band wrapped covering; the peripheries of the two groups of cable cores are provided with total segregation grease band wrapped coverings, total shielding
layers, compound water-proof
layers, armor
layers and
halogen-free and low-smoke outer jackets in sequence from inside to outside; and a
polypropylene filler is arranged between the two groups of cable cores and the total segregation grease band wrapped coverings. The shielded low-smoke and low-
toxicity signal cable has the properties of
fire resistance, waterproofness, prevention of
insect pest, small amount of smog during
combustion, less release of small quantity of toxic gases, and the like, and can be widely applied to subway and
light rail signal control systems.