A charging processing method includes: A charging trigger device sends a charging request message to a charging processing device, where the charging request message includes redundant transmission information, that is, related information of redundant transmission used for a data connection service in a data connection session; and the charging processing device performs charging processing based on the redundant transmission information, including determining a redundant service charging processing mode, performing charging processing on a usage amount reported by the charging trigger device, sending usage amount processing indication information to the charging trigger device, or the like.