Provided is a method for producing an organopolysiloxane emulsion composition which contains an organopolysiloxane having a trialkyl group at a terminal thereof and having a viscosity of 50,000 mm 2 /s or more at 25°C, within a shorter time compared with the conventional methods. A method for producing an emulsion composition which contains an organopolysiloxane having a viscosity of 50,000 mm 2 /s or more at 25°C and capped with a trialkylsilyl group, said method comprising: (I) emulsifying a mixture comprising (A) an organopolysiloxane, (B) a nonionic surfactant, (C) an anionic surfactant, (D-1) an acidic compound and (E-1) water to prepare an emulsion composition； (II) adding (D-2) an acidic compound and (E-2) water to the emulsion composition to perform emulsion polymerization； and (III) adding 0.001 part by mass or more of (F) a compound to the resultant product to perform emulsion polymerization again.
