Abstract: To address the issues of insufficient utilization of multi-scale semantic information and high computational costs resulting from the generation of lengthy sequences in existing Transformer-based semantic segmentation networks, this paper proposes an efficient semantic segmentation backbone named MFE-Former, based on multi-scale feature enhancement. The network mainly includes the multi-scale pooling self-attention (MPSA) and the cross-spatial feed-forward network (CS-FFN). MPSA employs multi-scale pooling to downsample the feature map sequences, thereby reducing computational cost while efficiently extracting multi-scale contextual information, enhancing the Transformer’s capacity for multi-scale information modeling. CS-FFN replaces the traditional fully connected layers with simplified depth-wise convolution layers to reduce the parameters in the initial linear transformation of the feed-forward network and introduces a cross-spatial attention (CSA) to better capture different spaces interaction information, further enhancing the expressive power of the model. On the ADE20K, Cityscapes, and COCO-Stuff datasets, MFE-Former achieves mean intersection-over-union (mIoU) scores of 44.1%, 80.6%, and 38.0%, respectively. Compared to mainstream segmentation algorithms, MFE-Former demonstrates competitive segmentation accuracy at lower computational costs, effectively improving the utilization of multi-scale information and reducing computational burden.