Emplaced in gneiss of Taishan Group, the Zaozhuang subalkalic complexhas an isotopic age of 101--133Ma. The present paper deals Inainly with the relationship between typomorphiccharacteristics of apatite and its origin, makes an examination on such experi-mental data of. apatite as REE distribution, X-ray diffraction, crystal unitparameters and infrared spectra, and conducts a tentative investigation into theformation temperature of apatite, the concentration of P2O5, the physical-che-mical condition for ore formation and the genetic type of apatite deposit.