Abstract: The effects of temperature and time on the soluble solids,browning and turbidity of concentrated arrowhead juice were studied by decompressing concentration. The rheological properties of the concentrated arrowhead juice at different temperature and concentration were measured. The results showed that concentrated arrowhead juice was non-Newtonian pseudo plastic fluid in a certain range of temperature and concentration,and had the basic characteristics of shear thinning and thixotropic fluid. The effect of temperature on viscosity followed the Arrhenius equation. The effect of concentration on viscosity could be expressed by the exponential equation more accurately. The equation of the combined effect of temperature and concentration on viscosity of concentrated arrowhead juice was deduced. The equation could be well used to describe the change of the viscosity of the concentrated juice,and provide a theoretical basis for the industrial production of the concentrated arrowhead juice.