This paper proposes Space-Frequency Aware RAW Image Object Detection Enhancer (SFAE), a novel framework that integrates spatial and frequency domains to improve the performance of RAW image-based object detection. We note that existing methods struggle to effectively recover suppressed object details due to the wide dynamic range and linear response of RAW images, which only process the spatial domain. We leverage the natural ability to separate features such as object contours and textures in the frequency domain. SFAE reverse-transforms frequency bands to the spatial domain, enabling intuitive understanding. It utilizes a cross-domain fused attention module that enhances the interaction between spatial and frequency-domain features, and performs adaptive nonlinear adjustments for each domain.