The invention relates to the technical field of medical equipment, in particular to a concealed blood collection device used in a blood cell analyzer. The concealed blood collection device includes a blood cell analyzer body, a control panel is fixedly installed on the blood cell analyzer body, the bottom of the blood cell analyzer body is fixedly connected to a pedestal through support columns, the bottom ends of blood temporary storage tubes are communicated with a blood transfer cavity, and the concealed blood collection device is installed at the bottom of the blood transfer cavity. According to the concealed blood collection device used in the blood cell analyzer, by setting the concealed blood collection device, the blood cell analyzer not only has blood cell analysis function, but also can pump collected fresh blood into a blood cell extraction analysis device for detection, thus achieving efficient and rapid work. Therefore, the test precision of the blood cell analyzer can be enhanced.