Abstract: Abstract: With the application of bacterial cellulose in industry, the rheological properties of bacterial cellulose suspension, dissolved in heavy metals and organic solvents, have received extensive attention. However, heavy metals and some organic solvents can't be used in food, drug and cosmetic industry. Therefore, this study was aimed to investigate the rheological properties of bacterial cellulose suspension. Firstly, the surface morphology of bacterial cellulose was observed by atomic force microscopy (AFM). Secondly, the rheological properties of bacterial cellulose suspension were investigated by static and dynamic methods. Specifically, consistency and index of viscosity of bacterial cellulose suspension were determined by a Texture Analyzer (TA) with AB/E35 probe under static condition, and carboxymethyl cellulose(CMC) solution was used as a control. Furthermore, consistency and indexes of viscosity of these two kinds of suspension were compared in the present study. Additionally, the dynamic method was used to study the relationship of shear stress, apparent viscosity and shear rate with a rheometer. Finally, the stability of bacterial cellulose suspension and its improvement ways by centrifugation were studied in this paper. Results showed that the width of bacterial cellulose s was between 60-80 nm. The AFM imagines showed that the microfibrils were randomly arranged with plenty of spaces among them and some s may be gathered to form a parallel or spiral bundle. From the rheology analysis, it was found that the consistency and index of viscosity of bacterial cellulose suspension were significantly higher than those of carboxymethyl cellulose solution. Additionally, when the concentration changed from 0.4% to 1.2% a positive correlation was found between the consistency and viscosity index of bacterial cellulose suspension and the concentration of bacterial cellulose (P<0.05, R2>0.95). The equation between consistency and concentration of bacterial cellulose suspension was y=936.17x+38.166 (R2=0.9753). The equation between viscosity index and concentration of bacterial cellulose aqueous suspension was y=61.872x-21.641 (R2=0.9988). So bacterial cellulose s can be widely applied in food as thickening agent and dietary fiber, or paper and cosmetics industries as dispersing agent and binding agent. Under the condition of a relatively low shear rate(0.02-10 s-1), the apparent viscosity of bacterial cellulose suspension decreased with the increase of shear rate. On the contrary, under the condition of the same shear rate, the apparent viscosity and shear stress of bacterial cellulose suspension increased with the increase of concentration of bacterial cellulose suspension. The suspension displayed a shear-thinning behavior, so the bacterial cellulose suspension was called as non-Newtonian fluid. The suspension appeared to flow until the shear stress exceeds the yield stress and the values of shear stress were positively related to the values of shear rate (P<0.05, R2>0.99). So the bacterial cellulose suspension was called as Bingham plastic fluid. The stability of initial bacterial cellulose suspension was only 80%; however, when the CMC was added into the suspension, the stability of the bacterial cellulose suspension increased a lot. In addition, when the concentration of CMC was about 0.5%, the stability of bacterial cellulose suspension increased to about 95%. Therefore, CMC can improve the stability of bacterial cellulose suspension.