A method for carrier aggregation-based demodulation is provided, which includes: when uplink data sent by UE based on a scheduled SCC is received, if a current moment is a periodic CQI reporting moment and a first PCC scheduling result of the UE is not received when a demodulation format used for demodulating the uplink data needs to be determined before the current moment, demodulating the uplink data respectively based on a first demodulation format and a second demodulation format, to obtain a first demodulation result, a second demodulation result, a first check result, and a second check result; and if the first PCC scheduling result is already received when the demodulation is completed, determining, based on the first PCC scheduling result, the first demodulation result, the second demodulation result, the first check result, and the second check result, a demodulation result of correctly demodulating the uplink data.