By adopting the multi-period double difference method, with the implementation of cross-border e-commerce pilot zone policies taken as a quasi-natural experiment, an evaluation is made of the impact of digital trade on the internal salary gap of enterprises. Research shows that digital trade narrows the internal salary gap in enterprises mainly by alleviating financing constraints and improving human capital levels. Results of heterogeneity tests indicate that under the classification of non-state-owned, eastern enterprises, digital trade plays a more significant role in narrowing the internal salary gap. A further analysis reveals that digital trade is only restricted to narrow the internal salary gap of local enterprises, failing to play a role in neighboring enterprises within a certain range.