The invention belongs to the technical field of medicines, and provides a compound preparation of antituberculosis medicaments, and a preparation method thereof. Rifampicin, isoniazid, pyrazinamide and ethambutol hydrochloride as four leading antituberculosis medicaments are prepared into the compound preparation according to specific mixture ratio. The method comprises the steps of evenly mixing the leading drugs with an appropriate quantity of disintegrant and diluent, performing dry-process granulation, finishing granules, adding other auxiliary materials to the granules and preparing the obtained product into a suitable preparation. The invention solves the problems that patients are difficult to cooperate closely and complete normal chemotherapys because the antituberculosis medicaments are high in dosage, large in dosage form and troublesome in medicine-taking method, and the compound preparation and the preparation method accord with global tuberculosis direct-observation short-range supervision chemotherapy strategy (DOTS) recommended by the WHO. The antituberculosis fixed-dose compound preparation has important significance for simplifying medicine-taking method, carrying out the DOTS and controlling tuberculosis prevalence.