Provided is a method of manufacturing a cold-rolled steel sheet. The method includes: cold-rolling a steel material; applying nickel (Ni) powder on a surface of the cold-rolled steel material in a coating amount of 300 mg/m2; heating the steel material to completely transform the steel material to austenite; slowly cooling the heated steel material at a cooling rate of 5-12° C./s to a slow cooling termination temperature of 630-670° C., and maintaining the steel material at the slow cooling termination temperature for 10-90 seconds; rapidly cooling the slowly cooled and maintained steel material at a cooling rate of 7-30° C./s to a temperature range of a martensitic transformation termination temperature or higher and a martensitic transformation initiation temperature or lower; and maintaining the rapidly cooled steel material at a temperature higher than the martensitic transformation initiation temperature and the bainite transformation initiation temperature or lower for 300-600 seconds and partitioning the steel material.