The invention provides a method for promoting leaf 
cutting rooting of multi-fleshy 
plant of 
crassulaceae by IBA treatment, and relates to the technical field of 
plant cutting propagation. The method mainly comprises the following steps: 1, matrix preparation, 2, 
cutting mother 
plant selection and leaf treatment, 3, leaf cutting, 4, soil, 
fertilizer and water management, and 5, 
seedling transplanting. The leaf cutting treatment step specifically comprises the following substeps: after leaves are picked off, placing the leaves in a cool and ventilated place for shade-
drying treatment for 72 h-120 h; starting cutting after wounds at the bases of the leaves are dried and become red, dipping the leaves in IBA with the concentration of 15-20 mg.L<-1> for 1-10 seconds before cutting, wherein thecutting temperature is kept at 25-30 DEG C, the 
air humidity is 70-80%, and the matrix 
humidity is 30-35%; and carrying out conventional after rooting. According to the invention, IBA treatment with the concentration of 20mg. L<-1> is adopted after the leaves become red basically or begin to turn red, the formation of root primordia can be effectively promoted through the treatment mode, the rooting rate is improved by 8.88%, the 
root system effect index is improved by 0.93, and the rooting time is shortened by 5-7 days.