Disclosed are an authentication method and device for a video stream address applied in the field of network live broadcast. The method comprises: upon receiving an instruction to watch a video displayed in a target live broadcast room, acquiring call-stack information by means of a target underlying library function, the call-stack information having stored therein a function identifier of a called function, the target underlying library function being a system-level function of an operating system of a live broadcast client; reading M authentication elements, the M authentication elements being associated with a current state of the live broadcast client; performing hash function processing on the call-stack information and the M authentication elements to generate a video stream address authentication key value simultaneously associated with both the call-stack information and the M authentication elements; and transmitting , to a video stream server, a video stream address request carrying the video stream address authentication key value and the M authentication elements, the video stream address request requesting, from the video stream server, a video stream address of the target live broadcast room. The present invention solves a technical problem in the prior art in which authentication for a video stream address has a low security level.