Environment-friendly composite foam extinguishing agent and preparation method thereof

The invention provides an environment-friendly composite foam extinguishing agent and a preparation method thereof.The environment-friendly composite foam extinguishing agent comprises functional raw materials and water, and the functional raw materials account for 16-50% of the weight of the water. The functional raw materials comprise 45-130 parts of a foaming agent, 1-5 parts of a stabilizer, 6-10 parts of a thickening agent, 4-10 parts of a degradable fluorocarbon surfactant, 20-65 parts of an anti-burning agent, 60-90 parts of an anti-freezing agent, 5-10 parts of a cosolvent and 0.3-7 parts of an auxiliary agent, and the foaming agent comprises a mixture of polyglycerol ester, alkyl glycoside, straight-chain fatty alcohol polyoxyethylene ether sulfate and a betaine type surfactant in a weight ratio of (0.5-5): (1-5): (1-5): 1. The structural formula of the degradable fluorocarbon surfactant is Rf-X-Y, Rf is a perfluorinated alkyl group, X is fluoroolefin, and Y is an alcohol group. Through the synergist