We present an integrated study of zircon U-Pb dating and O—Hf isotopic analysis on metamorphic rocks in the Jiaozuo area, Henan, central North China Craton. A two mica K feldspar gneiss sample contains 3.3~3.4 Ga detrital zircon and 2.47±0.02 Ga metamorphic zircon. The detrital zircon has εHf(3.40Ga) and tDM2(CC) ranging from -2.4 to 13.9 and 2.89 to 3.84 Ga, respectively; whereas the metamorphic zircon has εHf(2.47Ga) and tDM2(CC) ranging from -18.8 to -6.4 and 3.38 to 4.13 Ga, respectively. A biotite hornblende gneiss sample only contains metamorphic zircon with an age of 2.49±0.01 Ga and εHf(2.49Ga) of -15.0 to -3.8 and tDM2(CC) of 3.23 to 3.91 Ga. Combined with geochemical data and early studies, some conclusions can be drawn as follows. (1) Detrital sediments were derived from a source region where 3.4 Ga granitoidic rocks widely occurred, formed as a result of mixture of mantle and crustal material; (2) the sedimentary rocks underwent a strong tectono—thermal event at the end of the Neoarchean (~2.5 Ga), with anatexis resulting in the formation of granite veins; (3) the formation (deposition) time of the metasedimentary rocks can be limited to between 2.5 ~ 3.3 Ga; (4) metamorphic zircon is similar in Hf isotope composition to the detrital zircon, suggesting that the overgrowth rims were formed through the dissolution—reprecipitation of zircon cores.