Climate change affects global production and consumption of food, water and energy, and directly threatens national and regional food security and social stability, thus the relative research is detrimental to the national human prosperity and global sustainable development. Land degradation is an international hot topic in recent years. Many international platforms like IPCC, IPBES and UNCCD have done assessments on the land degradation, especially have focused on the dynamics, trends, impacts, and responses. Although climate change and land degradation are interconnected, there is a lack of understanding of their complex relations and solutions. IPCC has performed its first climate change and land degradation assessment from 2017 to 2019, and released the special report in August of 2019. Based on the report, here we analyzed the complex interaction and feedback between climate change and land degradation, their potential change in the future, and solutions to deal with these problems. The main contribution of the special report is that it clarified the linkages and feedbacks between climate change and land degradation, further recognized that land use change was the main driver of climate change, and indicated that the increasing human pressure and food consumption aggravated climate change and land degradation. However, land is also a solution to many environmental problems we faced today. Changing the human diet can address climate change and land degradation simultaneously. The window of opportunity to restrict global warming with 1.5℃ is rapidly shrinking. We need to promote the diet transition, reduce carbon emission, implement sustainable land management, enable synergies between climate change mitigation and land restoration, and apply smart carbon dioxide removal technologies in order to address the worsening climate change and land degradation.