The invention aims to provide a nano bactericidal and environment-friendly laundry detergent. Nanoscale silicon carbide particles and natural plant ingredients are used as main raw materials, salvia officinalis essential oil, a nerium oleander extraction product, a grape skin and seed enzymatic hydrolysate and distillers' grain water extraction solution contain rich bioactive components, synergistic interaction and antibacterial and bactericidal effects are realized, the laundry detergent has a natural plant fragrance, and the problems that most existing laundry detergents are poor in bactericidal capacity and lasting antibacterial property and has certain toxicity are solved.