Objective: To investigate the pollution and distribution characteristics of heavy metals in different parts of Rosa roxburghii. Method: The contents of heavy metals in different parts of R. roxburghii were determined by atomic absorption spectroscopy and atomic fluorescence spectrometer. Then the contents of heavy metals were evaluated by using bioconcentration factors(BCF)method

pollution index method

and correlation analysis. Result: The standard curves of Pb

As

Hg and Cd (heavy metals) were Y=373.54X-2.168 7(0-100 μg·L-1)

Y=120.184X+1.626(0-100 μg·L-1)

Y=742.222X-16.301(0-2 μg·L-1)

and Y=0.023 3X+0.017 9(0-10 μg·L-1)respectively(r ≥ 0.999). Among 131 samples of R. roxburghii (including 15 batches of root

48 batches of stem

48 batches of leaf

and 20 batches of fruit)

25 batches of samples exceeded the standard of heavy metals based on the limits of heavy metals in Green Standards of Medicinal Plants and Preparations for Foreign Trade and Economy(WM/T2-2004)

including 16 batches of Cd

4 batches of Hg

4 batches of Pb and 1 batch of As. The single factor pollution index of heavy metals was Cd>Pb>Hg>As. The comprehensive pollution index in different parts of R. roxburghii was root > stem > leaf > fruit. The average BCF was Cd > Hg > Pb≈As. The average contents of heavy metals (Pb

As

Hg

and Cd) in 45 batches of soil samples in R. roxburghii base were all lower than the limit values in Grade Ⅱ national standard for soils

complying with the requirements on the limit values of heavy metals in base soils for the cultivation of Chinese herbal medicines. Conclusion: The Cd pollution of R. roxburghii mainly comes from soil

while Hg

Pb

and As may be related to atmospheric deposition and agricultural activities.