The invention discloses a technical method for culturing flowers without soil. According to the method, flower roots are pruned, old dried roots are cut off and removed to make the roots distributed in an umbrella shape, and the pruned roots are placed into a potassium permanganate solution to be soaked for disinfection treatment; the roots which are soaked for disinfection in the previous step are placed into a solution formed by stirring and blending Guoguang rooting powder with water, and the solution is kept still for rooting treatment; a nutrient solution is prepared and obtained; a substrate is prepared, and substrate fillings are prepared and obtained; the obtained substrate fillings are previously packed into a containing pot for culturing the flowers, then the flower roots subjected to the rooting treatment are placed into the containing pot, the surrounding areas of the roots are filled with the substrate fillings, and after the roots and the substrate are tightly compressed,the obtained nutrient solution is poured into the pot; the cultured flowers and plant leaves in the containing pot are trimmed, and then water is sprayed to maintain the surfaces of the leaves moist.By selecting the reasonable nutrient solution to cooperate with the substrate for protection of the flower roots and supplementation of nutrient components, the survival rate of the flowers culturedwithout soil can be increased.