The invention discloses a mask and a processing technology thereof, and relates to the technical field of mask processing. The mask comprises a mask body and ear bands, the mask body comprises an inner non-woven fabric layer, a filtering layer and an outer non-woven fabric layer which are arranged in sequence, one side, deviating from the filtering layer, of the inner non-woven fabric layer is a skin opposite surface, one side, deviating from the filtering layer, of the outer non-woven fabric layer is a skin back surface, the mask body is provided with a first pleated part, a second pleated part, a third pleated part and a fourth pleated part in the width direction, the mask body is bent into a structure with an omega-shaped cross section at the second pleated part and the third pleated part, the processing technology comprises the steps that the inner non-woven fabric layer, the filtering layer and the outer non-woven fabric layer are stacked into a semi-finished product, the side edges of the semi-finished product are hot-pressed, the ear bands are welded, a nose bridge strip is fixed, the upper edge and the lower edge of the mask body are hot-pressed, and a silicone sheet is bonded. The mask has good ductility and can better wrap the face of a wearer, and an excellent protection effect is achieved.