The present invention relates to a detector for detecting visible foreign matter in bottled liquid medicines, comprising a base, and a bottle inlet device, a plate rotation device, a light source device, an image capturing device, a bottle clamping and releasing device, and a bottle outlet device fixed on the base. The bottle inlet device is used for advancing the to-be-detected liquid medicine bottles, the liquid medicine bottles are rotated by the plate rotation device to facilitate the image capturing device to detect, the light source device provides light for the liquid medicine bottles, the bottle clamping and releasing device is used for clamping and releasing the liquid medicine bottles, and the detected liquid medicine bottles are removed from the bottle outlet device. The detector is reasonable in structure design, can automatically detect liquid medicine bottles through streamlined operations, does not need artificial detection of foreign matters, prevents subjective errors on artificial detection, and improves work efficiency.