The embodiment of the invention discloses a network slice resource scheduling method and device, relates to the technical field of communication, and is used for solving the technical problem of relatively low network slice resource utilization rate caused by relatively poor flexibility of a network slice resource scheduling process in the prior art. The method comprises the following steps: sending, by the NWDAF device, a first message carrying the request information and the period duration corresponding to the preset period to the network management OAM device every other preset period; receiving network slice service evaluation data in a target time period acquired by the OAM device according to the request information and the period duration; and finally, determining whether to send aslice resource scheduling request to the OAM device or not according to a target service evaluation rule obtained from the target application function AF device in advance and the network slice service evaluation data, so that the OAM device schedules the network slice resources according to the slice resource scheduling request. The embodiments of the present invention are used for scheduling network slice resources.