The utility model discloses a multilayer composite cable, which comprises a conductive cable, a first composite layer, a second composite layer, a third composite layer, a fourth composite layer, a fifth composite layer and a sixth composite layer are sequentially sleeved outside the conductive cable, and the multilayer composite cable is characterized by further comprising a plurality of baffle rings, a first sleeve and a second sleeve, the baffle ring is arranged between the first composite layer and the second composite layer, the baffle ring is arranged between the third composite layer and the fourth composite layer, and the baffle ring is arranged between the fifth composite layer and the sixth composite layer; a plurality of baffle rings, a first sleeve and a second sleeve which are used for separating the first composite layer, the second composite layer, the third composite layer, the fourth composite layer, the fifth composite layer and the sixth composite layer are arranged among the first composite layer, the second composite layer, the third composite layer, the fourth composite layer, the fifth composite layer and the sixth composite layer; a plurality of interlayers are formed among the first composite layer, the second composite layer, the third composite layer, the fourth composite layer, the fifth composite layer and the sixth composite layer, so that functional filling agents with different functions can be conveniently filled into the interlayers.