The invention relates to a novel oil tea shampoo and a preparation method thereof. The novel oil tea shampoo contains tea saponin. The tea saponin is a pentacyclic triterpene saponin substance, is a nonionic surfactant, has performances of emulsification, dispersion, moistening and foaming, and has pharmacological effects of resisting permeation, diminishing inflammation and killing germs. The novel oil tea shampoo can resist bacteria and viruses, kill microbes, prevent hair losing, remove scurf, relieve itching in head, preserve moisture, moisten head skin, black hair, maintain beauty, protect hair, prevent hair breaking, and inhibit a plurality of skin pain or itch symptoms, has no toxic or side effect, has rich foam, has a lasting effect and has strong hair washing, protection and nourishing functions.