An antenna blocking alarm method performed by a communication chip or a communication device comprising the communication chip, the method comprising: obtaining an attenuation value of an air interface loopback signal through an antenna; determining, based on the attenuation value, whether the antenna is blocked; and when determining that the antenna is blocked, indicating, by the communication chip, a processor to output, to a user, alarm information prompting that the antenna is blocked, or outputting, by the communication device to the user, the alarm information prompting that the antenna is blocked; wherein the antenna comprises a first antenna and a second antenna; and the obtaining an attenuation value of an air interface loopback signal through an antenna comprises: transmitting a measurement signal through the first antenna, and receiving the measurement signal looped back to the second antenna; and determining the attenuation value based on a strength value of the measurement signal and a strength value of the looped back measurement signal; wherein the communication chip comprises a Bluetooth module and a wireless fidelity Wi-Fi network module, and the transmitting a measurement signal through the first antenna, and receiving the measurement signal looped back to the second antenna comprises: when a Wi-Fi service of the communication chip is idle, generating, by the Bluetooth module, a monophonic signal or a modulation signal of specific strength as the measurement signal; transmitting, by the Bluetooth module, the measurement signal through the first antenna; receiving, by the Wi-Fi network module, the measurement signal looped back to the second antenna; and determining, by the Wi-Fi network module, the attenuation value based on the strength value of the measurement signal and the strength value of the looped back measurement signal. obtaining an attenuation value of an air interface loopback signal through an antenna; determining, based on the attenuation value, whether the antenna is blocked; and when determining that the antenna is blocked, indicating, by the communication chip, a processor to output, to a user, alarm information prompting that the antenna is blocked, or outputting, by the communication device to the user, the alarm information prompting that the antenna is blocked; wherein the antenna comprises a first antenna and a second antenna; and the obtaining an attenuation value of an air interface loopback signal through an antenna comprises: transmitting a measurement signal through the first antenna, and receiving the measurement signal looped back to the second antenna; and determining the attenuation value based on a strength value of the measurement signal and a strength value of the looped back measurement signal; wherein the communication chip comprises a Bluetooth module and a wireless fidelity Wi-Fi network module, and the transmitting a measurement signal through the first antenna, and receiving the measurement signal looped back to the second antenna comprises: when a Wi-Fi service of the communication chip is idle, generating, by the Bluetooth module, a monophonic signal or a modulation signal of specific strength as the measurement signal; transmitting, by the Bluetooth module, the measurement signal through the first antenna; receiving, by the Wi-Fi network module, the measurement signal looped back to the second antenna; and determining, by the Wi-Fi network module, the attenuation value based on the strength value of the measurement signal and the strength value of the looped back measurement signal. transmitting a measurement signal through the first antenna, and receiving the measurement signal looped back to the second antenna; and determining the attenuation value based on a strength value of the measurement signal and a strength value of the looped back measurement signal; wherein the communication chip comprises a Bluetooth module and a wireless fidelity Wi-Fi network module, and the transmitting a measurement signal through the first antenna, and receiving the measurement signal looped back to the second antenna comprises: when a Wi-Fi service of the communication chip is idle, generating, by the Bluetooth module, a monophonic signal or a modulation signal of specific strength as the measurement signal; transmitting, by the Bluetooth module, the measurement signal through the first antenna; receiving, by the Wi-Fi network module, the measurement signal looped back to the second antenna; and determining, by the Wi-Fi network module, the attenuation value based on the strength value of the measurement signal and the strength value of the looped back measurement signal. when a Wi-Fi service of the communication chip is idle, generating, by the Bluetooth module, a monophonic signal or a modulation signal of specific strength as the measurement signal; transmitting, by the Bluetooth module, the measurement signal through the first antenna; receiving, by the Wi-Fi network module, the measurement signal looped back to the second antenna; and determining, by the Wi-Fi network module, the attenuation value based on the strength value of the measurement signal and the strength value of the looped back measurement signal.