Method and device for detecting repeated simulation messages

The invention provides a method and device for detecting repeated simulation messages. The method comprises that a first simulation message received in a first period and a second simulation message received in a second period are obtained; a serial number field value in a pseudo-line control word of the first simulation message and a serial number field value in a pseudo-line control word of the second simulation message are detected; and the serial number field value in the pseudo-line control word of the first simulation message is compared with the serial number field value in the pseudo-line control word of the second simulation message, and when the second simulation message includes the serial number field value the same with that of the first simulation message, it is determined that the second simulation message includes the simulation message which repeats at least part of the first simulation message. Thus, repeated simulation messages transmitted in the network environment are detected, the detected repeated simulation messages are deleted, and the network reliability is improved greatly.