Ceiling filter cotton with uniform airflow

The ceiling filter cotton comprises a filter cotton body, the lower portion of the filter cotton body is a three-dimensional gum dipping layer, and an air purification side coating nanometer film is arranged outside the three-dimensional gum dipping layer. A plurality of deep pits are formed in the upper surface of the filter cotton body. And the thickness of the filter cotton body is 25mm +/-5 mm. The deep nest is preferably in a conical shape. According to the utility model, 50% depth of uniform circular taper nests and rhombuses are arranged on the surface of the filter cotton body, so that air flow is slightly blocked in the process of raising the filter cotton, the air flow is uniformly distributed on the whole surface of the filter cotton, and the uniformity of the air flow is ensured. The rhombic arrangement of the uniform circular nests on the surface increases the working surface of the filter cotton with the same area, and the conical structure of the nests on the surface of the filter cotton increa