The invention relates to a nanolevel zero-valent iron particle coated with oleic acid-Pluronic and a synthetic method thereof, belonging to the technical field of environmental materials. The invention aims at providing a nanolevel zero-valent iron particle coated with oleic acid-Pluronic which can form stable suspending liquid in water and a synthetic method thereof. The synthetic method comprises the following steps: 1) the nanolevel zero-valent iron particle and the oleic acid with the mass ratio of 4.0:1 to 8.5:1 react for 0.5 to 3 hours under the temperature of room temperature to 80 DEG C to obtain the nanolevel zero-valent iron particle coated with oleic acid; and 2) the nanolevel zero-valent iron particle coated with oleic acid and Pluronic F-127 with the mass ratio of 4.5:1 to 6.5:1 react for 9 to 10 hours under the temperature of the room temperature to 30 DEG C to obtain the nanolevel zero-valent iron particle coated with oleic acid-Pluronic. The invention has the advantages of simple synthetic method and easy operation and repeat and the like; and the obtained nanolevel zero-valent iron particle coated with oleic acid-Pluronic has application prospect in the field of underground water remediation.