Kuahuqiao, Neolithic archaeological site in Xiaoshan District, Hangzhou, China.

Kuahuqiao is a nationally protected archaeological site in Hangzhou, China, located near the Qiantang River. The excavations have uncovered the remains of stilt villages built on swampy ground, along with tools, pottery, plant remains, and animal bones.

The site was discovered in the early 1970s during construction of a brick factory, which destroyed a large part of it; professional excavations began in 1990. Three campaigns through 2002 uncovered about 1,000 square metres. Radiocarbon dating with tree-ring calibration places the remains at roughly 8000–7000 years ago, and in 2004 the Kuahuqiao culture was formally named.

The site gave its name to the Kuahuqiao culture, formally named on 17 December 2004. Its potters mixed wild rice into the clay as a bonding material, and excavations have yielded painted pottery, jade artifacts and wooden, stone and pottery utensils. The earliest domesticated peach known anywhere was also found here.

The site lies on the south bank of Xianghu in Wenyan Subdistrict, Xiaoshan District, about 700 m south of the old Kuahuqiao bridge site. Excavations covered over 1,000 m², and the cultural layers are 1–3 m thick. The site is an archaeological locality rather than a developed attraction, so access should be checked in advance.

One of the oldest known dugout canoes in the world was found here, pointing to early skills in shaping wood for water travel long before similar finds elsewhere. The same site also yielded traces of peach cultivation, suggesting that fruit trees were being grown intentionally at a very early stage.