Provided is a composition for preparing emulsion or microemulsion formulations that demonstrates favorable dilution properties without being affected by the solubilities of constituent components. The composition for preparing emulsion or microemulsion formulations contains a component (A): a polyoxyalkylene allyl phenyl ether, polyoxyalkylene aralkyl phenyl ether or polyoxyalkylene aralkenyl phenyl ether, a component (B): a polyoxyalkylene sorbitan alkylate, a component (C): a dialkylsulfosuccinate, and a component (D): an ester ether-based solvent. An emulsion or microemulsion formulation containing the composition is also provided.
