Environment-friendly water-soluble anti-caking agent, and preparation method and application thereof

The invention discloses an environment-friendly water-soluble anti-caking agent, and a preparation method and application thereof. The environment-friendly water-soluble anti-caking agent is prepared from the following components in percentage by weight: 10 to 15 percent of aluminum potassium sulfate, 10 to 15 percent of aluminum ammonium sulfate and 70 to 80 percent of lauryl sodium sulfate, wherein the weight percentage sum of the components is 100 percent. The anti-caking agent provided by the invention is fully water-soluble powder; after the anti-caking agent and a water-soluble chemical fertilizer are mixed, the water-soluble chemical fertilizer is insusceptible to caking, and the water-soluble chemical fertilizer is directly dissolved into water, does not float on water in the chemical fertilizer applying process, is convenient to spray and avoids pollution to the water and the environment. The invention also provides the preparation method and the application of the environment-friendly water-soluble