Self-insulation building material for alpine regions and preparation method

The invention discloses a self-insulation building material for alpine regions. The self-insulation building material comprises the following raw materials in parts by weight: 30-50 parts of cement, 8-15 parts of fly ash, 5-10 parts of slag powder, 10-20 parts of stone powder, 8-15 parts of straw particles, 15-20 parts of polyphenyl particles, 0.5-2 part of a foaming agent, 1-3 parts of calcium stearate, 0.5-2 part of an accelerator, 0.5-1.5 part of a polycarboxylic acid water reducer and 20-30 parts of water. The heat conductivity coefficient can be 0.06 w/m.k or below, and the material can be used for fire-free overwintering of agricultural greenhouses in northern regions. During preparation, other raw materials except the foaming agent and the accelerator are mixed with water to support slurry, then the water is mixed with the foaming agent and the accelerator, a foaming solution is prepared through an air compressor, and the self-heat-preservation building material in the alpine region is obtained after t