The invention discloses a nanometer essence mosquito expelling bath lotion. The nanometer essence mosquito expelling bath lotion comprises floral type nanometer microcapsule essence bath foam and fruity flavor type nanometer mosquito expelling essence bath foam, wherein the floral type nanometer microcapsule essence bath foam is prepared through the steps of S1, preparing materials of 4-5% of citionella oil, 0.05-0.15% of bay leaf oil, 0.5-1.5% of mint oil, 0.1-1% of bergamot, 0.1-1.5% of cablin patchouli herb oil, 1-2% of lavender oil, 0.1-1% of methyl ionone, 0.01-0.1% of vanillin, 0.01-0.1%of coumarin, 0.01-0.03% of sandalwood oil, 0.005-0.015% of 5% indole and 0.2-0.4% of galaxolide. Compared with other bath lotions, the nanometer essence mosquito expelling bath lotion disclosed by the invention has the advantages that the problem of short holding time of mosquito expelling effects of ordinary mosquito expelling bath lotion is solved; and nanometer mosquito expelling essence is prepared through a nanometer technology and is added to a traditional bath lotion as an effective component, so that the stability of the mosquito expelling essence is improved, the volatilization of mosquito expelling components is avoided, the release of the mosquito expelling components is controlled, and the mosquito expelling effects are strengthened. The mosquito expelling essence disclosed bythe invention is a natural plant extract, is good in the mosquito expelling effects, is free from irritating effects to skin, and is pure and gentle in fragrance and smell.