Embodiments of the present invention provide a method and a device for scheduling downlink data transmission, includes: sending scheduling basic information to a user equipment; receiving a scheduling request reported by the UE, where the scheduling request carries at least one scheduling parameter that is determined by the UE according to the scheduling basic information; determining whether the scheduling parameter determined by the UE in the scheduling request needs to be modified; sending a scheduling request response to the UE according to a result of the determining, where the scheduling request response indicates whether the scheduling parameter determined by the UE in the scheduling request needs to be modified; and if it is determined that there is a scheduling parameter that needs to be modified, sending, to the UE, a modified parameter value of the scheduling parameter that needs to be modified.