The invention provides a method for detecting a tiny bleeding point. The method comprises: extracting a brain parenchyma region from a SWI image and a QSM image of a raw scanned image of a brain; according to gray value features of the tiny bleeding point on the SWI image and the QSM image, respectively performing threshold segmentation on the SWI image and the QSM image of the brain parenchyma region, to obtain suspected tiny bleeding points on the SWI image and the QSM image; and according to bleeding features of the tiny bleeding points, respectively verifying the suspected tiny bleeding points, to obtain a target bleeding point. In addition, the invention also provides a detection device for tiny bleeding points.