Recently transformer models have become prominent models for single image deraining (SID) task. However, these models often fail to utilize frequency knowledge and appropriate self-attention mechanisms effectively, leading to inadequate extraction of rain features and persistent artifacts. To alleviate this problem, we propose Adaptive Sparse and Frequency-Guided Transformer Network (SFformer) for single image derain. Specifically, we propose Adaptive Sparse Attention (ASA) module to selectively pay attention to the most useful channels for better feature aggregation. In addition, considering that rain streaks mainly correspond to the high frequency components in the image, we introduce Frequency-Guided Feedforward (FGF) module to focus on rain streaks. Integrating these proposed modules into a UNet backbone, extensive experimental results on commonly used benchmarks show that the proposed method outperforms current state-of-the-art method. The source code of our work is available at https://github.com/HuluBaba/ECEDerain .