Existing most spatial interaction models assume that the distance-decay effect in modelling space is spatially isogenous, but spatial heterogeneity widely exists in the modelling space. Thus, our research proposed a novel localised spatial interaction model quantitatively representing the variation of the distance-decay effect in commuting travel behaviour at the local level. Our research also confirms a positive relationship between average travel distance and distance-decay effect in commuting trips at the local level and discusses the possible reason for this phenomenon. Finally, the potential relationship between those variations and residents' social-economic characteristics has been explained by a regression model.