The drawwork of 5000m geological core drilling rig is designed to meet the new requirements of deep exploration engineering for drilling equipment. Our project team was awarded the research and development program of 5000m geological core drilling rig. As the core part of the drilling rig, the drawwork needs to meet the requirements of automatic and intelligent drilling. After investigation of the development status of the drawwork, the project team determined the operation parameters and the scheme with reference to the structure of the oil drilling drawwork, and completed the design of the drawwork with design and selection of the key part. Through capacity checking calculation, it is proved that the operation parameters of the drawwork are reasonable, which can meet the requirements of ultra-deep hole core drilling technology, and can be applied in geothermal, shallow oil and gas exploration and production and other fields.