Inter-cut preventing system for digital satellite broadcast transmission

An inter-cut preventing system for digital satellite broadcast transmission comprises transmitting terminal equipment and receiving terminal equipment. In the transmitting terminal equipment, encryption signals generated by an encryption signal generator are modulated by a signal modulator into carrier wave with the frequency above 16kHZ, receives bandpass filtering from a first bandpass filter, is superimposed with external digital program signals subjected to bandstop filtering by a signal superimposer, and is transmitted by a satellite transmitter. In the receiving end equipment, superposed signals outputted by a satellite receiver sequentially pass through a second bandpass filter and is extracted and restored into encryption data of the corresponding frequency band by the signal modulator, and whether the encryption data is in accordance with reference encryption signals or not is identified and judged by a signal encryption and identification unit; and the judgment result is output to a switching contro