The invention discloses a waterproof cable with a compact structure and a small gap. The cable comprises a conductor and a jacket layer covering the outer side of the conductor, wherein the jacket layer is prepared from the following raw materials in parts by weight: 26 to 32 parts of nitrile rubber, 20 to 35 parts of silicone rubber, 10 to 20 parts of chlorinated polyethylene, 1.5 to 2.5 parts of dicumyl peroxide, 1 to 2 aprts of N,N'-m-phenylenedimaleimide, 0.3 to 0.4 part of potassium ammonium dichromate, 0.4 to 0.8 part of poly-p-nitrosobenzene, 0.4 to 1.2 parts of dioctyl phthalate, 2 to 4 parts of bis(2-ethylhexyl) phthalate, 2 to 4 parts of chlorinated paraffin, 45 to 65 parts of white carbon black, 4 to 10 parts of diatomite, 8 to 12 parts of sepiolite, 10 to 18 parts of modified corn fibers, 1.5 to 2.5 parts of 2-ethylhexyl 9,10-epoxyoctadecanoate, 1.5 to 2.5 parts of epoxidized methyl linoleate, 1.5 to 2.5 parts of tributyl citrate, 8 to 16 parts of wheat protein, 1.5 to 3.5 parts of zinc stearate, 1 to 2 parts of antioxidant 264, and 2 to 3 parts of ultraviolet absorbent UV-531.