Passive fire extinguishing fireproof blanket for cable and preparation method thereof

The invention discloses a preparation method of a passive fire-extinguishing fireproof blanket for a cable and the fireproof blanket. A fireproof blanket body is formed by combining and processing a flame-retardant waterproof layer, a thermal radiation flame-retardant layer, a flame-retardant explosion-proof layer and a passive fire-extinguishing layer from top to bottom; the flame-retardant waterproof layer is formed by combining at least three material layers, and the passive fire extinguishing layer is made of flame-retardant rubber and at least made of flame-retardant rubber with the heat-resistant temperature ranging from 190 DEG C to 210 DEG C. According to the preparation method of the passive fire-extinguishing fireproof blanket for the cable and the fireproof blanket thereof, the passive fire-extinguishing fireproof blanket for the cable with a traditional fireproof and explosion-proof function and a power-free self-induction fire-extinguishing function can be obtained by sewing the four layers of ma