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Superficial scald of pear fruit is a physiological disorder that easily occurs during cold storage and seriously affects pear eating quality and commodity value. It is important to study the mechanism of superficial scald disorder. Our previous study reported that the incidence of superficial scald of calcium chloride (CaCl₂)-treated pear fruit during storage was significantly lower than that of untreated fruit. In this study, we found that the accumulation of lignin in CaCl₂-treated fruit was significantly lower than that of untreated fruit. The expression of the <i>Pb4CL2</i> gene in the lignin synthesis pathway was downregulated in the CaCl₂-treated fruit. The lignification level of the fruit overexpressing <i>Pb4CL2</i> was significantly higher than that of the empty vector fruit. Therefore, we speculate that downregulation of <i>Pb4CL2</i> after CaCl₂ treatment plays an important role in CaCl₂ inhibiting superficial scald disorder by affecting lignin accumulation in pear fruit.