Objective To investigate the concentration of perchlorate in rice and its products sold in Foshan and provide a theoretical basis for formulating food safety standards and risk management.Methods In March 2021， 233 samples of rice and its products sold in 25 communities from the five districts of Foshan were collected from farmers’ markets， supermarkets， restaurants， and maternal and child stores. An LC/MS-based method was utilized to evaluate the perchlorate concentration in the rice and rice products.Results Perchlorate was detected in 57.8% （52/90） of rice samples， 98.8% （79/80） of wet rice noodles samples， 90% （18/20） of glutinous rice products， 100% （12/12） of local rice products， and 87.1% （27/31） of baby complementary rice-based food samples. The average concentrations of perchlorate were 2.5 μg/kg in rice samples， 6.5 μg/kg in wet rice noodles samples， 3.7 μg/kg in glutinous rice products samples， 4.3 μg/kg in local rice products samples， and 5.5 μg/kg in baby complementary rice-based food samples. Among different types of rice， the average concentration of perchlorate was 2.9 μg/kg in indica rice， 0.5 μg/kg in japonica rice， and 4.2 μg/kg in glutinous rice.Conclusion Perchlorate pollution is prevalent in rice and rice products sold in the markets of Foshan. Lower levels are detected in rice compared with rice products and infant/young children’s complementary foods. Wet rice noodles have the highest level of perchlorate contamination among rice products； the second highest level of perchlorate contamination was detected in baby complementary rice-based foods.