Abstract: Filamentous microorganisms are wildly employed in industrial biotechnological processes, one of the most foucsed topics is their morphology which closely correlates with the productivity and broth rheology and volumetric power input.Many physiological mechanism and physical factors were involved in the process of morphology include agitation systems, inoculum, medium components.This assay also viewed the trends of the morphology control of filamentous microorganisms in submerged fermentation.