Abstract: The present disclosure discloses a device for automatically collecting snot, which comprises a suction nozzle, a collecting cup, a cup holder and a shell component which are detachably connected in sequence, wherein the shell component is a hollow cavity. The present disclosure generates negative pressure suction through the air pump, and then the suction air enters the inner collecting cup through the air suction pipe, the cup holder air inlet, the air inlet channel and the micropore in sequence. Finally, the suction sucks the snot in the nose of a user into the inner collecting cup through the suction nozzle, effectively solving the problem of snot reflux.