Porcine circovirus type 3（PCV3）is a new infectious disease pathogen. The United States firstly reported PCV3 in 2016. In order to understand the distribution of PCV3 in China，the PCR method on PCV3 was established. The results of sensitivity and specificity showed that the lowest detection amount of nucleic acid for PCV3 was 38 pg，and a specific fragment of 284 bp could be amplified. A total of 168 suspected samples were collected from Hebei Province by PCR，and 9 positive samples were detected，which indicated that PCV3 infection was present in swine herds in Hebei Province.