Objective To understand the contamination of cadmium in some food in Siming district. Methods Food samples were randomly collected from supermarkets and open fairs and tested by graphite furnace atomic absorption spectrometry according to GB/T 5009.15—2003 Determination of Cadmium in Foods. Results The rates exceeding the limit for cadmium in aquatic products and edible fungus were 31.8% and 82.4% in tested samples respectively. Conclusion The contamination of cadmium in some foods was serious in Siming district. It is suggested that enhancing a comprehensive treatment of the environment on breeding industry, paying more attention to the quality management of input materials in the breeding industries and the culture medium for fungi; establishing unified standards on food quality and safety and strengthening construction of a food security monitoring system.