Objective: To determine content of polysaccharides of different processing drugs(plain-frying drugs

stir-heating drugs with wine and stir-heating drugs with salt) in Cuscuta australis.To explore the processing principle from the angel of changes of polysaccharides. Method: The conversion coefficient of C. australiss polysaccharides to mannitose was obtained by refined polysaccharides

and then the content of crude polysaccharides in C.australis and its processed products were determined by phenol-sulferic acid method. Result: Afer refining

monosaccharide composition of polysaccharides have no obvious changes. The color of solutions for testing showed good stabilization within 6 h and the average value of the recovery for polysaccharides measurement was 99.4% with 3.02% of RSD (n=6). The contents of polysaccharides and different processing drugs(plain-frying drugs

stir-heating drugs with wine and stir-heating drugs with salt) in C.australis were 6.71%

8.27%

8.54%

14.17%

with 0.59%

2.47%

1.40%

0.35% of RSD(n=3). Conclusion: The content of polysaccharides obviously increased after processed. Salt content is the highest;plain-frying and wine content took second place.