A method for preparing an emulsion for a cationic electrodeposition coating composition at an emulsification field, wherein the method includes synthesizing a base resin for a cationic electrodeposition coating composition, removing the base resin in a liquid state from a reaction vessel and then changing the resin into a solid state, and optionally, adjusting a size of the resin into an predetermined size, and emulsifying the resin at the emulsification field by adding water and an optional solvent, a neutralizing agent, a curing agent or additives, wherein the base resin is an aminated resin and has a softening point of 20-90° C., and wherein the adjusted shortest size of the base resin is 40 cm or less. Furthermore, the present application relates to a method for transporting a resin for cationic electrodeposition coating composition.