The invention relates to a preparation method of a traditional Chinese medicine compound preparation for improving hypertensive left ventricular hypertrophy, which comprises the following steps: (1) adding ethanol into tetrandrine and performing reflux extraction; combining the reflux liquid, and recovering ethanol under reduced pressure to obtain a concentrated solution and herb residues; (2) mixing the herb residues obtained in step (1) with ligusticum wallichii, rosewood, processed cyperus rotundus L, kudzu root, angelica, red peony root, white peony root, and rehmanniae radix, adding water into the mixture to obtain a mixed herb solution; decocting the mixed herb solution; filtering; adding water into the filtered filter residues and decocting the solution; filtering; combining the decocted solutions obtained by the two decoctions, concentrating under reduced pressure to obtain a stiff paste; (3) combining the concentrated solution obtained in step (1) with the stiff paste obtained in step (2); drying the mixture; pulverizing into fine powder; (4) adding starch or dextrin into the fine powder to prepare tablets or loading the fine powder to prepare capsules so as to obtain thetraditional Chinese medicine compound preparation. The compound preparation prepared by the invention can improve hypertensive left ventricular hypertrophy, and has the characteristics of extensive acceptability, simplicity and high practicability, positive efficacy, low price, and easy popularization.