Mud-resistant modified naphthalene water reducer and preparation method thereof

The invention discloses a mud-resistant modified naphthalene water reducer and a preparation method thereof, and the preparation method comprises the following steps: adding a naphthalene water reducer into n-octane, then adding ferrocenyl glycidyl ether, continuously introducing N2, stirring for reaction, carrying out rotary evaporation to remove a solvent, and washing and drying a product to obtain an intermediate product; and adding the intermediate product and triethylamine into n-octane, continuously introducing N2, dropwise adding bis (2, 6-dimethylphenyl) phosphoryl chloride while stirring, continuously stirring to react after dropwise adding, carrying out rotary evaporation to remove the solvent, and washing and drying the product to obtain the anti-mud modified naphthalene water reducer. The prepared water reducing agent is low in cost, high in water reducing rate and stable in performance, has an excellent anti-mud effect, can solve the problem that the fluidity of high-mud-content gravel premixed c