A satellite communication method and apparatus are provided, and are applied to the field of communication technologies. The method includes: A communication apparatus may determine that the communication apparatus is allowed to perform a global navigation satellite system (GNSS) measurement in a connected-discontinuous reception (C-DRX) inactive state, and then perform the GNSS measurement based on a relationship between an end moment of the C-DRX inactive state and a GNSS validity period. In an example, the end moment of the C-DRX inactive state may be within the GNSS validity period. In another example, the end moment of the C-DRX inactive state may be outside the GNSS validity period. Based on different relationships, the communication apparatus may perform the GNSS measurement in different time periods, or report GNSS validity duration at different times, or the like.