The invention discloses a high heat-resistant porous organic silicon alloy elastomer material and a method for preparing the same. The method comprises master batch preparing: weighing 40% to 50% of alloy component one, 20% to 30% of alloy component two, 0.5% to 1.5% of cross-linking agents, 0.5% to 1.5% of constitution control agents, 15% to 25% of reinforcing agents and 0.05% to 0.15% of catalysts to be fully mixed, and allowing the mixture to stand for 2 to 4 hours; mixing: adding, by weight, 2% to 6 % of foaming agents, 1% to 3% of foaming assistants and 1% to 4% of vulcanizer into the master batch to be mixed for 10 to 30 minutes; vulcanization and foaming: vulcanizing and foaming rubber compound, and cooling and domolding after two phases of reaction; and post-processing: obtaining the high heat-resistant porous organic silicon alloy elastomer material after three phases of stoving. The high heat-resistant porous organic silicon alloy elastomer material has the advantages of low density, high softness, ductility, elasticity and porosity, and good physical properties of mechanical shock or impact absorption and high frequency damping. The material can be used continuously for a long time at a high temperature, is inflaming retardant, and can be widely applied in the fields of industry, agriculture, communication, military, construction, daily articles and the like.