The invention relates to a preparation method of an artemisia anomala tea beverage. The preparation method comprises steps as follows: impurity removal: artemisia anomala is washed and dried; water extraction: effective ingredients in artemisia anomala are dissolved out with an impregnation method or a decocting method, and an aqueous extract solution is prepared; alcohol precipitation: the aqueous extract solution is concentrated and is subjected to impurity removing with an alcohol deposition method to prepare a concentrated solution, the concentrated solution is dried to form artemisia anomala essence powder or is blended for filling, and the artemisia anomala tea beverage is obtained. The formula is scientific and reasonable, and the artemisia anomala tea beverage has functions of relieving summer-heat and quenching thirst and is beneficial to body health after long-term drinking; further, the artemisia anomala tea beverage has good flavor, tastes good, does not have a foul breath after drinking, and has a unique style.