High-efficiency environment-friendly water extinguishing agent and preparation method

The invention relates to a high-efficiency environment-friendly water extinguishing agent and a preparation method. The water extinguishing agent is composed of a fire retardant A, a fire extinguishing agent B, an auxiliary I, an auxiliary II, water and a surface active agent, wherein the fire retardant A comprises diammonium hydrogen phosphate, disodium hydrogen phosphate, dicyandiamide and borax; the fire extinguishing agent B comprises 2-(2-butoxy ethyoxyl)ethanol and water; the auxiliary I comprises nekal, a dispersing agent, lauryl sodium sulphate, sodium dodecyl benzene sulfonate, sodium tripolyphosphate and sodium bicarbonate; and the auxiliary II comprises ammonium bicarbonate, glycerinum, maltose powder, urea and salt. The preparation method disclosed by the invention comprises the following steps: respectively preparing the fire retardant A, the fire extinguishing agent B, the auxiliary I and the auxiliary II; and mixing the fire retardant A, the fire extinguishing agent B, the auxiliary I and the surface active agent with water, heating to be above 80 DEG C, keeping the temperature for 1-2h, and cooling to obtain the high-efficiency environment-friendly water extinguishing agent. The prepared water extinguishing agent has the positive effects of being capable of instantly extinguishing fire and ensuring that fire cannot be burnt again; the fire extinguishing speed is obviously higher than that of existing products; and no any decomposer harmful to the environment can be generated.