Abstract: Zinc particles with the diameter of 3-5 nm were prepared by roller vibration milling in dry mode at room temperature.The mixture of nano zinc oxide and nano zinc was obtained by hydrolysis reaction through heating the nano zinc particles at different temperatures.The chemical composition and the surface morphology of the products were studied by means of energy emission spectrograph,X-ray diffraction and transmission electron microscopy.The growth mechanism of the hydrolysate was investigated.The results show that the products of the reaction of nano zinc particles and steam at 250℃ had good dispersivity,whose structure was composed of rod-shape and lath-shape.The rod-shape ZnO was hexagonal close-packed,and the nanorods grew obviously along the 0,1,1,1 direction.The ZnO growth mechanism was tip growth.