A method and an apparatus for processing voice data. A specific implementation of the method includes: receiving voice data sent by a user terminal; extracting a voiceprint characteristic vector in the voice data; matching the voiceprint characteristic vector with a registered voiceprint vector prestored by the user, and generating a matching degree between the voiceprint characteristic vector and the registered voiceprint vector; determining whether the matching degree is greater than or equal to a preset update threshold; and updating the registered voiceprint vector by using the voiceprint characteristic vector and the voice data in response to determining that the matching degree is greater than or equal to the preset update threshold. This implementation enhances accuracy of a registered voiceprint vector of a user.