This article introduces Professor WU Weiping's experience in treating bronchiectasis based on the thought of "half treating from collaterals and half treating as abscess". Professor WU classified this disease under the category of "lung collaterals abscess" and proposed the general principle of "half treating from collaterals and half treating as the abscess"， based on the core pathogenesis of lung-spleen qi deficiency and phlegm-stasis heat accumulation. Treatment should be based on syndrome differentiation according to the pathological characteristics of the disease at different stages. During the acute exacerbation stage， when the lung qi depletion and phlegm-heat congestion obstruct the lung collaterals and form into lung abscess， the methods should therefore focus partly on resolving stasis and unblocking to treat from the collaterals， and partly on clearing heat， eliminating phlegm and draining pus to treat as the abscess. Modified Qianjin Xiejing Decoction （千金苇茎汤） and Loulu Lianqiao Decoction （漏芦连翘汤）. During the chronic protracted stage， when there is lung-spleen qi deficiency， along with collateral deficiency and latent abscess， the main focus should be half on regulating the middle jiao （焦）， moving qi and consolidating the exterior to treat from collaterals， and half on rectifying lung， dispelling stasis and resolving phlegm to treat as the abscess， with modified Yupingfeng Powder （玉屏风散） and Liujunzi Decoction （六君子汤）. At the same time， attention should be paid to differentiating phlegm， blood， and cough to tailor the prescription.