Abstract: The municipal solid waste (MSW) treatment and disposal unit is an important source of greenhouse gas (GHG) emissions, and clarifying its emission trends is a prerequisite for formulating greenhouse gas emission reduction measures. This article uses the IPCC inventory model to estimate the GHG emissions of MSW disposal units in 9 provinces of the Yellow River Basin from 2012 to 2022. The results show that the GHG emissions in the nine provinces along the Yellow River increased from 22.85 million tons CO₂ -eq in 2012 to 31.53 million tons CO₂-eq in 2019, and then decreased year by year, reaching 23.33 million tons CO₂-eq in 2022. Shandong, Sichuan, and Henan are the main emitting provinces. Strengthening methane reduction and resource utilization in landfills, further implementing MSW classification, improving the efficiency of recyclable waste resource utilization, and staged utilization of incineration waste heat are feasible strategies for carbon reduction in MSW disposal units.