The invention discloses washing powder containing nano carbon crystal grains and belongs to the technical field of daily supplies. The washing powder comprises, by weight percentage, 1-15% of anionic surfactant, 1-5% of nonionic surfactant, 1-10% of macromolecule washing aid, 0.1-2% of sodium carboxymethyl cellulose, 5-20% of sodium carbonate, 8-15% of sodium silicate, 1.3-2.8% of caustic soda liquid, 20-60% of anhydrous sodium sulfate, 0.05-0.5% of whitening agent, 0.1-1% of biological enzyme, 0.1-0.4% of essence, 5-15% of 4A zeolite and 1-10% of modified nano carbon crystal grains. The washing powder has the advantages that the washing powder has effects of ultrastrong decontaminating and sterilizing, washing and sterilizing are completed at the same time, a washing process is simplified greatly, washing time is saved, a good washing effect can be achieved under a cold water condition, the washing powder is unlimited by region geographic positions and temperature and is wide in application range and low in pollution to environments.