Green Standard Army is the name of a category of military units under the control of the Qing Dynasty in China. It was made up mostly of ethnic Han soldiers and operated concurrently with the Manchu-Mongol-Chinese Eight Banner armies.

The original Green Standard troops were the soldiers of the Chinese commanders who surrendered to Qing in 1644 and after. Their troops enlisted voluntarily and for long terms of service; they usually came from the socially disadvantaged, and remained segregated from Chinese society, partly because of the latter's deep anti-military bias, and partly because they were paid too poorly and irregularly to marry and support a family.

From the eighteenth century on the Green Standard Army served primarily as a gendarmerie or constabulary force, designed to maintain local law and order and quell small-scale disturbances. However, it was also contributing the bulk of forces dispatched in major campaigns. The Green Standard Army was extremely fragmented, with literally thousands of large and small outposts throughout the empire, many with as few as twelve men. It was divided into garrisons of battalion size, reporting through regional brigade generals to commanders-in-chief (提督) in each province. Governors and governor-generals each had a battalion of Green Standard troops under their personal command, but their primary duties lay in the judicial and revenue areas rather than coping with invasion or rebellion. During peacetime, it was rare for one officer to command more than 5,000 men.

Strictly speaking, the Green Standard Army was not a hereditary force, although the dynasty directed its recruiting efforts primarily at sons and other relatives of serving soldiers. Enlistment was considered a lifetime occupation, but it was generally very simple to be reclassified as a civilian.

By 1800 both the Banner forces and the Green Standard armies had declined to a low level of military effectiveness, as was shown in both the Opium War and the Taiping Rebellion.