The invention relates to a device for separating ovum and imago squamae by air flows, in particular to an ovum and imago squamae separator which adopts the structure that a supporting plate of a base is respectively provided with a material barrel provided with a screen stencil on a bottom opening and a collection barrel with a close bottom, the openings of the material barrel and the collection barrel of the supporting plate of the base are respectively connected with a material pipe and a connecting pipe through sealing flanges, the lower opening of a separating barrel with the top providedwith a sealing cover plate is connected with a funnelled sediment chamber, and the lower opening of the sediment chamber is connected with the upper opening of the connecting pipe; the lateral wall of the separating barrel is provided with an air suction inlet, an air pump is connected with the air suction inlet of the separating barrel through a pipeline provided with an air valve, the front side of the air suction inlet is provided with an air stop box connected with the lateral wall of the separating barrel into an integer and provided with an opening on the lower part, and a cone connected to the lower end of a regulating screw rod which is arranged on the sealing cover plate of the separating barrel is matched with the upper opening of the material pipe inside the separating barrel. The ovum and imago squamae separator can automatically separate ovum and imago squamae by negative-pressure air flows, thereby purifying the working environment and being beneficial to the body healthof operators.