Empty barrel foreign matter detection system and detection method

The invention discloses an empty barrel foreign matter detection system and method, and relates to the technical field of foreign matter detection.The empty barrel foreign matter detection system comprises a first clamping rotating assembly and a second clamping rotating assembly which are arranged in sequence, and the first clamping rotating assembly and the second clamping rotating assembly are both used for clamping and rotating an empty barrel; the first photographing unit and the second photographing unit are located on the periphery of the first clamping and rotating assembly; the first light source is located in the first clamping and rotating assembly and is in linkage with the first photographing unit; the second light source is located outside the first clamping and rotating assembly and is in linkage with the second photographing unit; the third photographing assembly and the fourth photographing assembly are sequentially located on the upper portion of the second clamping and rotating assembly; th