The document presents a Dense Nested Attention Network (DNA-Net) designed for infrared small target detection in cluttered backgrounds, addressing limitations of traditional CNN methods that lose target information due to pooling layers. It introduces a Dense Nested Interactive Module (DNIM) for maintaining target information across layers and a Cascaded Channel and Spatial Attention Module (CSAM) to enhance multi-level features. Experimental results demonstrate that the proposed method outperforms existing state-of-the-art techniques in detection probability, false-alarm rate, and intersection over union.