The present invention discloses a benzodioxane derivative and applications thereof, and relates to a compound represented by a formula (I) or a medically acceptable salt thereof. According to the present invention, experiment results show that the benzodioxane derivative can be used for preparation of neuropsychic disease treatment drugs, in vitro receptor binding test results show that the derivative provides high affinity for SERT and 5-HT1A receptors, and animal test results show that an immobility time of mice can be significantly reduced in the acute treatment with the compound, such that the compound of the present invention provides a neuropsychic disease treatment effect, especially a depression treatment effect.