The invention discloses a traditional Chinese medicine for external use for treating tinea. The traditional Chinese medicine comprises the following raw materials in parts by weight: 10-15 parts of sophora flower, 3-5 parts of gleditsia sinensis, 2-4 parts of fructus kochiae, 1-3 parts of fructus cnidii, 5-7 parts of astragalus mongholicus, 4-5 parts of wing nut leaf, 3-5 parts of realgar, 6-8 parts of purslane, 5-7 parts of plantain herb, 3-4 parts of jade drum, 2-4 parts of rhizoma atractylodis, 5-7 parts of honeysuckle, 4-6 parts of lophatherum gracile, 1-2 parts of groundsel, 3-5 parts of cortex pseudolaricis, 5-6 parts of pollen typhae, 3-5 parts of Chinese polyphaga, 4-6 parts of bamboo louse and 2-4 parts of pothos chinensis. The traditional Chinese medicine composition has functions of clearing away heat and drying dampness, purging fire for removing toxin, killing parasites to relieve itching, preventing corrosion, inhibiting bacteria, diminishing inflammation and deodorizing, can be used for treating various tinea, takes effect quickly, is short in treatment course, free from side effects, simple in component, low in cost and convenient to use, and prevents recurrence.