Objective In order to ensure the accuracy,reliability and comparability of results for monitoring heavy metal contamination in foods.Methods Blind quality control samples based on bean powder or milk powder were delivered to 31 provincial CDCs and Xinjiang production and construction corps.The results of cadmium and mercury were statistically analyzed by internationally accepted "Z-score" and FAPAS.Results The testing results were submitted on time.The recovery rate was 93.8% and the qualified rate was 90.6% for cadmium.The recovery rate was 96.8% and the qualified rate was 93.8% for mercury.The qualified rate was 90.6% for both elements.Conclusion The general capability of testing heavy metal contamination in foods is relatively high in provincial centers for disease control and prevention at present.However,the detection level of individual laboratories needs to be improved.