The invention belongs to the field of building materials and provides a high molecular foam concrete foamer. The high molecular foam concrete foamer is prepared from the following raw materials in parts by weight: 3-5 parts of polyvinylpyrrolidone, 1-3 parts of fatty glyceride, 1-3 parts of sodium dodecyl benzene sulfonatem, 1-2 parts of sodium carboxymethylcellulose, 1-3 parts of a polyacrylate copolymerized emulsion and 85-90 parts of tap water. The high molecular foam concrete foamer provided by the invention is high in foaming efficiency, stable in performance and small in damaging abilityto the environment, the materials are simple and easily available, and the cost is controlled; the prepared foamer is added into the concrete material, so that the compressive strength of the concrete is not reduced.