In August 2021, the Intergovernmental Panel on Climate Change (IPCC) released the Summary for Policymakers of the Physical Science Basis in the Sixth Assessment Report (AR6), which mainly made a systematic assessment of the scientific research progress of climate change since the Fifth Assessment Report (AR5) in 2013, and used the new generation climate model to project future climate change under the new shared socio-economic path scenario.Based on the materials of relevant chapters in AR5 and AR6, this paper interpreted the assessment conclusion of drought change.