Beidou satellite receiving terminal time integrity verification method

The invention belongs to the technical field of satellite navigation system application and discloses a Beidou satellite receiving terminal time integrity verification method. The method includes: performing processes of time maintenance and message packaging and processes of spread spectrum modulation and carrier wave modulation, realizing processing of change information of leap years, leap seconds and time year information by a Beidou satellite receiving terminal, completing time integrity verification of the Beidou satellite receiving terminal, enabling the Beidou satellite receiving terminal to actually receive Beidou satellite messages for a certain time before verification starts, and inputting the messages to a time maintenance process in a file manner; setting time parameters through the time maintenance process, performing time maintenance processing after verification starts to obtain correct time information, replacing time information in the actually-received Beidou satellite messages, and generating simulated Beidou satellite message frame data; and modulating the simulated Beidou satellite signals to a Beidou satellite signal frequency range through spread spectrum modulation and the carrier wave modulation, and receiving stimulated modulating signals by the Beidou satellite receiving terminal to realize time integrity detection.