The Battle of Pai-t'ou-tzu was an engagement during the Boxer Rebellion between regular Chinese Imperial forces and an outpost of Russian infantry located in Chinese territory. Even before the Boxer rising against foreign influence, an outpost of Russian troops had been located across the Chinese border near the village of Pai-t'ou-tzu, which lay close to Liaoyang. It was garrisoned by 204 Russian troops under Colonel Mishchenko. When hostilities began, the Chinese authorities advanced a guarantee of safe passage in exchange for his retreat to the south of Liaoyang. This was declined, and instead Mishchenko called for more Russian troops to reinforce his position.

Before the Russian position could be reinforced, fighting broke out. During the opening stages of the ensuing battle, Chinese guns bombarded the Russian right and front flanks, resulting in 14 Russian deaths and 5 wounded. Firing from long range at high trajectories, the Chinese artillery hit their marks, but at closer range proved inaccurate. Chinese regular infantry armed with rifles advanced, crawling under cover artillery fire towards the Russian defense perimeter of about 350 square feet. When the Russian fire slackened the Chinese troops renewed their attack. Chinese forces alternated between advance and retreat until the Russian position was over-run. Losses on both sides are uncertain but the Russian detachment may have been wiped out.