L. gracile is widely distributed in tropical and subtropical Asia, from southern India, Sri Lanka, Burma (Myanmar), Indo-China, southern China and Thailand to Korea, Japan, the whole Malaysian region and northern Australia. Light bamboo Ye Weigan, pale, cold; converted to, lungs, stomach, bladder, and light bleeding; With heat addition to annoying, diuretic effects of tonglin; Attending fever syncope, ulcers in the mouth and on the tongue, gums swelling, crying with fear in children, Lung-heat cough, stomach-heat vomiting hiccup, turbidity poured hot urination. To study the chemical constituents from the stems and leaves of Lophatherum gracile Brongn. Seven compounds were isolated and identified as cylindrin,tricin,uracil,swertiajaponin,7-methoxyluteolin-6-C-beta-D-galactopyranoside,salcolin-7-O-beta-D-glucopyranoside and luteolin-7-O-beta-D-glucopyranoside.