The invention discloses an environment-friendly building wall surface which comprises a flame-retardant layer, a sound insulating layer and a heat preservation layer from inside to outside. The heat preservation layer is constructed by a plurality of first building bricks, wherein each first building brick is formed by mixing heat preservation mortar with concrete and is filled with rock wool and polystyrene foam boards. The flame-retardant layer is constructed by a plurality of second building bricks, wherein each second building brick is prepared from concrete with phenolic aldehyde and is filled with polystyrene foam boards. The two sides of each first building block are provided with a concave block and a protruding block respectively, and the two sides of each second building block are provided with a concave block and a protruding block respectively. The first building blocks and the second building blocks are matched and connected through the concave blocks and the protruding blocks. The building wall surface has excellent shock absorption, sound insulation and flame retardance and is economical and environmentally friendly.