The invention provides a transparent neutral laundry detergent containing a high-concentration chelating agent and a preparation method thereof. The laundry detergent contains sodium fatty alcohol-polyoxyethyleneether sulfate (70 percent), alpha olefin sulfonate, nitric acid, sodium hydroxide, polyacrylate, 2-hydroxypropionic acid, a fluorescent whitening agent, isothiazolinone, essence, and deionized water; and the laundry detergent contains the high-concentration chelating agent, solves the problem that the adding amount of a chelating agent is limited in a laundry liquid due to reasons such as solubility and the like, and ensures that the laundry detergent has the characteristics of strong hard water-resistant ability, strong detergency, easy rinsing and the like under the condition of lower content of a surfactant. The laundry detergent adopts natural and renewable raw materials, can be completely biodegraded, is neutral, has no phosphorus, protects skin, clothes and the environment, and solves the problems of poor hard water resistance, poor detergency, large resource consumption, large using amount, and high cost of common laundry liquids.