[Objective] To obtain a rapid determination method for arsenic from Panax notoginseng(Burk.)F.H.Chen. [Method] Content of As was determined by heteromolybdoarsenic acid spectrophotometry, and the color-developing conditions were optimized. [Result] The optimum coloration conditions were : color-developing agent amount of 5.0 ml, color developing temperature of 40 ℃ and developing duration of 30 min. When the concentration of standard As Ⅲ solution ranged from 0 to 0.04 μg/ml, the linear relationship between concentration and absorbance was good (r=0.996 6). Arsenic was not detected in all the samples. [Result] High in precision and good in stability, the method can be used as the determination method for As from Panax notoginseng (Burk.) F.H.Chen. [Objective] To obtain a rapid determination method for arsenic from Panax notoginseng (Burk.) FHChen. [Method] Content of As was determined by heteromolybdoarsenic acid spectrophotometry, and the color-developing conditions were optimized. [Result] The optimum coloration conditions were: color-developing agent amount of 5.0 ml, color developing temperature of 40 ° C and developing duration of 30 min. When the concentration of standard As Ⅲ solution ranged from 0 to 0.04 μg / ml, the linear relationship between concentration and absorbance was good (r = 0.996 6). Arsenic was not detected in all the samples. [Result] High in precision and good in stability, the method can be used as the determination method for As from Panax notoginseng (Burk.) FHChen.