We analysed and measured the Pu content of 23 kinds of food in the 9 areas around the nuclear testing site and 3 control areas. The result revealed that there was no conspicuous difference about the Pu content of same kinds of food betwen the investigation areas and the control areas. Because of ingesting Pu，the residents' committed effective dose equivalents were 7.65 and 7.22μSv in the investiga-tion areas and the control areas respectively. The additive dose didn't affect people s health . In corresponding farmland，the Pu transfer coefficient to the plant was 0.2—5%, in the order of leaf,stalk，and fruit . The P23 was estimated from the inte-gral sediment density and the ingestive quantity of Pu in the residents' food，it was 0.70Bq
in the investigati on areas；and in the 0.72Bq
in the control areas . This data nearly corresponded with the P23
which was offered in UNSCE AR Report, 1982.