The invention relates to the field of traditional Chinese medicines and particularly relates to a capsule capable of dispelling wind and expelling toxin and a gas chromatography detection method and pharmaceutical application of the capsule. The capsule capable of dispelling wind and expelling toxin is prepared from the following raw materials in parts by weight: 5 parts of polygonum cuspidatum, 4 parts of fructus forsythia, 4 parts of radix isatidis, 4 parts of radix bupleuri, 4 parts of dahurian patrinia herb, 4 parts of verbena officinalis, 3 parts of rhizoma phragmitis and 2 parts of liquorice. The invention further provides a pharmaceutical application of the capsule capable of dispelling wind and expelling toxin.