The invention discloses an environmental-friendly sound insulation building material which comprises the following components in parts by weight: 1-2 parts of binding agents, 10-15 parts of plant fibers, 20-50 parts of mixed solvents, 5-20 parts of inorganic thickening agents, 5-10 parts of toughening agents, 5-15 parts of fire retardants, 5-15 parts of auxiliary fire retardants, 2-4 parts of mica powder, 1-6 parts of diatomite, 0.5-1.5 parts of ceramic powder, 3-10 parts of n-butyl alcohol, 6-9 parts of dimethyl benzene, 0.3-0.5 part of montmorillonite clay thickening agents, 0.1-0.3 part of wetting agents, 0.3-0.5 part of dispersing agents, 0.1-0.2 part of mildew-proof agents, 0.1-0.2 part of preservative agents, 0.3-0.4 part of defoaming agents, 1.0-2.0 parts of film-forming auxiliary agents, 0.2-0.5 part of anti-freezing agents and 1-3 parts of pigments. The environmental-friendly sound insulation building material disclosed by the invention has the advantages of good damping effect and high sound insulation property, and can not generate the substance harmful to a human body and the environment after being combusted.