In drilling operations of Canadian oil sands，the problem of reduced operational efficiency caused by asphalt adhering to drilling components is urgent to be addressed. However，this issue is rarely encountered domestically，and there are no effective so-lutions or relevant evaluation schemes to draw upon，making the research extremely challenging. This paper focused on asphalt cur-ing technology，drew on the mechanism of inorganic curing agents releasing active oxygen atoms at high temperatures to recon-struct oil sand components. For the first time，asphalt penetration was introduced as the main performance indicator in this study. Six typical commercially available inorganic curing agents were selected and hot-rolled with Canadian oil sands in aging tanks. The penetration of oil sands before and after curing，the adhesion of simulated steel rods，and the influence of drilling fluid performance were investigated. The results indicated that the inorganic curing agent sodium thiosulfate，anhydrous sodium acetate and potassium persulfate showed significant curing efficiency，which reduced the penetration value of asphalt from 108/0.1 mm to 25.89/0.1 mm and had long-term stability. Among them，the sodium thiosulfate system showed the best inhibition effect in the adhesion test of steel rods，and the adhesion rate of asphalt decreased significantly from 50.93% to 6.71%. Furthermore，the solidification of oil sands had little effect on the rheology of the drilling fluid system，but it would cause negative effects such as increased filter loss and simulated drilling tool corrosion. Through Fourier transform infrared spectroscopy analysis，it was found that the active ions in the curing agent，such as CH₃COO^-，SO₄^2-，had a chemical crosslinking reaction with the polar functional groups in the asphalt， such as —OH，—COOH. Four-component analysis found that the curing agent promoted the conversion of saturated hydrocarbons and aromatic hydrocarbons with low molecular weight in the asphalt component to resins and asphaltenes with high molecular weight. The results of scanning electron microscopy and polarizing optical microscopy further confirmed that the microstructure of the solidified asphalt formed a porous network skeleton，resulting in an increase in the porosity of the filter cake，furtherly aggravat-ed the increase in drilling fluid loss. This study reveals the action mechanism of inorganic curing agent and oil sand asphalt for the first time，and provides a theoretical basis for solving the adhesion problem of oil sand drilling.