The present invention relates to a herb composition for asthma maintenance therapy based on Chungsangboha-tang, which is known to be effective in asthma, capable of reducing the long-term suffering of asthma patients and improving their quality of lives and a manufacturing method thereof. The herbal composition of the present invention is characterized by comprising 5-18 parts by weight of Rehmanniae radix vaporata, 4-14 parts by weight oEDioscoreae radix, 4-14 parts by weight of Corni fructus, 2-9 parts by weight of Pachyma hoelen, 2-9 parts by weight of Moutan radicis cortex, 2-9 parts by weight of Alismatis rhizoma, 2-7 parts by weight of Schizandrae fructus, 2-7 parts by weight of Aspargus cochinchinensis, 2-7 parts by weight of Liriopsis tuber, 2-7 parts by weight of Fritillariae bulbus, 2-7 parts by weight of Trichosantes kirilowii, 2-7 parts by weight of Prunus armeniacae linn, 2-7 parts by weight of Pinelliae rhizoma, 2-7 parts by weight oEAurantii immaturus fructus, 2-7 parts by weight of Platycodi radix, 2-7 parts by weight of Scutellariae radix, 2-7 parts by weight of Coptidis rhizoma and 1-5 parts by weight of Glycyrrhizae radix.