Abstract: Reological behaviors of lotus root powder paste with different concentration, pH values, particle sizes and temperatures were measured by a concentric cylinder viscometer. The effects of concentration, particle sizes, pH values and temperatures on the reological behaviors were studied. The results indicated that the consistency index increased sharply from 0.434 to 20.302 when the concentration increased from 2% to 10%. The relationship between apparent viscosity (η_a) and concentration could be demonstrated by a regression equation (η_a=0.2287 C 2.5138, R=0.9931).