PDF-Extract-Kit is a specialized toolkit for extracting high-quality content from PDF files. It achieves deep parsing of PDF documents through multiple components, including layout detection, formula detection, formula recognition, and optical character recognition (OCR). The toolkit employs advanced models such as LayoutLMv3, YOLOv8, UniMERNet, and PaddleOCR to accommodate various types of PDF documents and has high accuracy in layout and formula detection. It is also optimized for scanning blurred or watermark-containing documents to ensure accurate extraction results in complex situations.