Microcrystalline cellulose is one of the cellulose derivatives are widely used in the pharmaceutical industry as an excipient in the manufacture of tablets. These filler materials are still largely imported. On the other hand, Indonesia has huge potential to generate microcrystalline cellulose from agricultural waste or weeds such as oil palm empty fruit bunch and water hyacinth. The purpose of this study was to find a potential cellulolytic mold and raw material for preparation of microcrystalline cellulose by enzymatic hydrolysis. At first, alpha cellulose was prepared by digesting raw material powder by alkaline condition. Cellulase enzymes are obtained through extraction from the cellulolitic mold and used to treat alpha cellulose at concentration of 2, 6 and 10 % v/v, respectively. Then, the resulted microcrystalline cellulose were identified by SEM (Scanning Electron Microscope) and XRD (X-Ray Diffraction) and compared with reference Avicel pH 101. The results showed that crude enzyme of isolated mold was better than Trichoderma resei enzyme activity, which produced lower concentration of glucose. Based on the comparison of crystal morphology and diffractogram pattern, water hyacinth has a great potential which showed similarities between the microcrystalline cellulose  obtained and microcrystalline cellulose reference (Avicel pH 101).