Lightweight waterproof rubber composition, lightweight waterproof rubber sole and preparation method thereof

The invention provides a light and waterproof rubber composition, a light and waterproof rubber sole and a preparation method thereof, the light and waterproof rubber composition comprises the following raw materials by weight: 100 parts of a rubber base material; 2.0 to 4.0 parts of zinc oxide; 0.5 to 1.5 parts of stearic acid; 15 to 45 parts of a blocking agent; 15 to 45 parts of carbon black N660; 2.0 to 4.0 parts of softening oil; 3.0 to 5.0 parts of a homogenizing agent; 0.8 to 1.2 parts of an anti-aging agent; 1.0 to 1.4 parts of an accelerant; and 0.5 to 0.7 part of sulfur. The light and waterproof rubber composition can be applied to shoe products and serves as a light and waterproof sole material. The rubber base material selects and combines the natural rubber and the butyl rubber, the natural rubber provides physical properties required by shoes, and side methyl groups in molecular chains in the butyl rubber are densely displayed to limit thermal activity of polymer molecules, so that the air perme