The embodiments of present disclosure provide a method for estimating a response of a baseband self-interference channel and an apparatus, where the method includes: estimating a response of a baseband self-interference channel to obtain a first estimation response of the baseband self-interference channel; starting to perform first full duplex communication; canceling baseband self-interference in a first baseband received signal according to the first estimation response, where the first baseband received signal is a baseband signal received during the first full duplex communication; determining a first parameter of the baseband self-interference channel; determining an estimation policy of the baseband self-interference channel according to the first parameter; and estimating the response of the baseband self-interference channel according to the estimation policy.