To reveal the impact and process mechanism of work energy on family relationship energy, this study sets up a Spillover-Crossover Model from the perspective of the dual-binary body of husband and wife. Using structural equation modeling to analyze paired data from 98 dual-earner couples, the results of this study showed that: 1) there is a positive correlation between work energy and the family relationship energy of employees themselves; 2) the husband's work-family confl ict completely mediates the impact of the husband's work energy on the family relationship energy, while the wife's work-family confl ict partially mediates the impact of the wife's work energy on the family relationship energy; 3) there is a symmetrical direct crossover effect between husband and wife on family relationship energy; 4) the husband's work energy level can directly affect the wife's family relationship energy, whilst the wife's work energy can only infl uence the husband's family relationship energy by enhancing their own family relationship energy. The results of this study aim to help relieve the pressure of work-family confl icts of working couples in order to creat a good atmosphere for family interaction.