Exosome separation and purification device

The utility model relates to an exosome separating and purifying device which comprises a cylinder body, a peristaltic pump, a shunting cover, a first filtering layer, a second filtering layer, a third filtering layer, a steel plate and a collecting groove, the shunting cover is provided with a peristaltic pump connector and a shunting channel, the peristaltic pump is connected with the peristaltic pump connector, the shunting cover is fixed on the cylinder body, and the first filtering layer, the second filtering layer, the third filtering layer, the steel plate and the collecting groove are arranged in the cylinder body. The first filtering layer, the second filtering layer and the third filtering layer are sequentially arranged in the cylinder body from top to bottom, and the collecting tank is arranged at the bottom of the cylinder body; the problems that in the prior art, extraction and separation of the exosome are achieved only through ultracentrifugation, immunomagnetic beads, ultrafiltration, precipi