<p>The compliance of fly ash pretreatment before landfill with toxicity and strength requirements is a crucial factor impacting the operation and management of fly ash landfill. In this study, we considered both traditional and improved resistivity measurement methods for cement-solidified products of municipal solid waste incineration fly ash. We analyzed the resistivity characteristics under different cement content and curing time, and explored the correlations between resistivity and strength or toxicity. The experimental results Compared with the "two-end" determination method, the difference in results can reach up to 25% in the former. However, the new method can control the difference within 2%.. As the cement content increased and the curing time extended, the resistivity gradually increased while the water content decreased. Using a power function model, it was feasible to directly characterize resistivity using moisture content if the cement content was low. When the cement content was high, it was necessary to introduce two parameters, namely cement content and curing time, to measure the influence of cement curing on resistivity.. The relationship between resistivity of cement-solidified fly ash and strength or toxicity was well described by both the fitting index model and the power function model. The fitting correlation coefficient exceeded 0.91 in most working conditions. Additionally, the correlation fitting coefficient reflects the significance, efficiency, and completeness of cement solidification, respectively. Based on this, the solidification effects of different heavy metals in fly ash were evaluated.</p>