A production method for an organopolysiloxane emulsion composition, wherein (I) an emulsion composition is prepared from an organopolysiloxane (A) that is represented by formula (1) and that has an octamethylcyclotetrasiloxane content of 1,000 ppm or lessHO(R12SiO)nH (1),(wherein R1 is H or a monovalent hydrocarbon group and n is a number that makes the viscosity, at 25° C., of the organopolysiloxane 200 mm2/s or more but less than 2,000 mm2/s), a surfactant (B) that is represented by formula (2) and that has an alkyl naphthalene skeletonR2a-C10H(7-a)SO3M (2),(wherein R2 is an alkyl group, M is H+, an alkali metal ion, an alkali earth metal ion, NH4+, or a tertiary NH4+, and m is 1-3), and water (C-1), and wherein (II) water (C-2) is added as necessary and then emulsion polymerization is performed in the presence of an acid catalyst (D). The organopolysiloxane produced has a viscosity of 300,000 mPa·s or higher at 25° C. and has an octamethylcyclotetrasiloxane content of 3,000 ppm or less. The particle size of the emulsion is 500 nm or less.
