Abstract: Objective: To understand the current pollution of formaldehyde, cadmium, plumbum and chromium in some waterishlogged
food products sold in one city. Methods: The contents of formaldehyde in 9 categories of samples were detected by the food safety rapid detector. The contents of cadmium, plumbum and chromium in 9 categories of samples were determined by flame atomic absorption spectrometry after pretreatment by dry-ashing. Results: The minimum content of formaldehyde in the 9 categories of samples was 2.122mg/kg and the maximum was 29.681 mg/kg. The minimum content of cadmium was 0.145 mg/kg and the maximum was 0.628 mg/kg.The maximum content of plumbum was 6.106 mg/kg, while lead was undetected in some samples. The minimum content of chromium was 0.168 mg/kg and the maximum content was 0.426 mg/kg. The differences of formaldehyde contents, cadmium contents, plumbum contents and chromium contents were statistically significant（P<0.01）. Conclusion: Formaldehyde and heavy metals contents in some waterishlogged food products sold in one city exceed the standards.

Key words: waterishlogged food products, formaldehyde, heavy metal, detection and evaluation