The invention discloses a method for preparing granules for treating alcoholic cardiomyopathy arrhythmia. The granules are applied to the therapy of alcoholic cardiomyopathy. The method is characterized by comprising the steps of (1) distilling Litchi chinensis Sonn., Stachys kouyangensis(Van.) Dunn and Aeschynomene indica L. by water vapor, so as to extract volatile oil for later use, and enabling dregs to be standby; (2) crushing Gekko gecko Linnaeus and Setaria italica (L.) Beauv. into fine powder for later use; (3) uniformly mixing Selaginella tamariscina (Beauv.) Spring, Begonia handelii Irmsch., Poncirus tuifoliata (L.) Raf., Polygonum aviculare L., Magnolia amoena Cheng, Dracocephalum moldavica L., Callicarpa nudiflora Hook. Et Arn. and the dregs obtained in the step (1), carrying out ethanol extraction twice, merging two alcohol extracts, filtrating, recovering ethanol, and carrying out depressurized concentration, so as to form an extract; (4) adding the fine powder obtained in the step (2) into the extract obtained in the step (3), uniformly mixing, drying at the temperature of 60 DEG C, crushing into fine powder, adding polysorbate-80, granulating, drying, finishing, spraying the volatile oil obtained in the step (1), uniformly mixing, and packaging granules, thereby obtaining the granules. Proved by clinical trials, the granules have the characteristics of good treatment effect and relatively high safety in the therapy of alcoholic cardiomyopathy, so that the granules are worthy of clinical application and popularization.