As a paint composition of cationic electrodeposition and a method preparing thereof, the paint composition of cationic electrodeposition comprises about 42 to about 47 percent by weight of a cationic electrodeposition resin composition, about 6 to about 13 percent by weight of a pigment paste composition, and about 40 to about 48 percent by weight of ion exchange water. An electronic part film coated by utilizing the paint composition of cationic electrodeposition on alloy such as an iron, an aluminum, etc. does not include a lead and a tin. In addition, when assembling electronic parts, an error rate is minimized by inhibiting frictional static electricity through anti-static capacity, and the probability of a fire is dirninished by inhibiting static electricity.