Traditional Chinese medicine for treating arrhythmia

The invention discloses a traditional Chinese medicine for treating arrhythmia. The traditional Chinese medicine is prepared by the following operations: preparing the following materials for later use: 9-11g of stem of noble dendrobium, 995-1005g of fructus cannabis, 495-505g of radix pseudostellariae, 495-505g of semen ziziphi spinosae, 400-500g of roasted radix liquiritiae, 400-500g of unprocessed rehmannia root and 400-500g of radix ophiopogonis; crushing the radix pseudostellariae into coarse powder; conducting warm immersion on the coarse powder with the addition of 75% ethanol for 30min; conducting reflux extraction twice, wherein the first time lasts for 2.5h and the second time lasts for 2h; combining extracting solutions; recovering ethanol; conducting concentrating so as to obtain a thick paste; decocting the fructus cannabis and the semen ziziphi spinosae with the addition of water twice, wherein the first time lasts for 2h and the second time lasts for 1.5h; filtering decoctions and combining fil