NOVELTY - The double component pouring sealant comprises a component A and a component B, where the component A comprises 100-120 parts by weight (pbw) of alpha - omega -dihydroxyl polydimethylsiloxane, 30-50 pbw of silicone oil, 80-100 pbw of heat conducting fillings, 50-60 pbw of fire retardant fillings and 30-50 pbw of nanometer calcium carbonate, the component B comprises 100-120 pbw of silicone oil, 20-40 pbw of crosslinking agents, 2-3 pbw of coupling agents, 0.5-1 pbw of catalyst and 1-1.5 pbw of colorant. A weight ratio of the component A to the component B is 6-8:1.    USE - The double component pouring sealant is useful for packaging solar photovoltaic module belonging to the field of high polymer sealing materials.    ADVANTAGE - The double component pouring sealant has increased fire resistance, improved heat conducting effect, excellent electric property, weather resistance and corrosion resistance.    DETAILED DESCRIPTION - The double component pouring sealant comprises a component A and a component B, where the component A comprises 100-120 parts by weight (pbw) of alpha - gamma -dihydroxyl polydimethylsiloxane, 30-50 pbw of silicone oil, 80-100 pbw of heat conducting fillings, 50-60 pbw of fire retardant fillings and 30-50 pbw of nanometer calcium carbonate, the component B comprises 100-120 pbw of silicone oil, 20-40 pbw of crosslinking agents, 2-3 pbw of coupling agents, 0.5-1 pbw of catalyst and 1-1.5 pbw of colorant. A weight ratio of the component A to the component B is 6-8:1. The silicone oil is dimethyl silicone oil, vinyl silicone or methyl vinyl silicone oil. The heat conducting filling is white powdery nanometer alumina with particle size of 18-22 nm and specific surface area of not less than 50 m2/g. The heat conducting filling is white powdery nanometer alumina with particle size of 18-22 nm and specific surface area of not less than 50 m2/g. The crosslinking agent is methyltrimethoxysilane, methyltris(methylisobutylketoxime)silane or vinyltris(methylisobutylketoxime)silane. The coupling agent is one or more than one of hexamethyldisiloxane, r-(2,3-epoxypropyl)propyltrimethoxy silane and r-aminopropyltriethoxy silane. The catalyst is di-n-butyl tin dilaurate, dibutyltin diacetate or dibutyltin dioctoate. The colorant is black, red or grey. An INDEPENDENT CLAIM is included for a method for preparing the double component pouring sealant.