The aim of this experiment is to study the potential of Oryza sativa pulp as a template of precursor calcining process method that is relatively cheaper than that sol gel method in alpha -alumina synthesis. Weight ratio between precursor and Oryza sativa pulp was 1 2. The effect of calcination temperature on alpha -alumina synthesis in this research set by variation calcination at 900 deg C 1000 ordm C and 1100 ordm C. In this research X-Ray Diffraction (XRD) analysis is used to investigate the transforming of crystal phase structure and size of the crystal formed by calcinations temperature. Scanning Electron Microscope (SEM) characterization is used to identify morphologi of alpha -Al2O3 powder.