Blind test system and blind test method for LTE (long term evolution) downlink control channel

The invention discloses a blind test system and a blind test method for an LTE (long term evolution) downlink control channel. The system comprises a base station, a downlink control channel and a user end. The blind test method firstly uses conventional blind test decoding including viterbi decoding and CRC (cyclic redundancy check) test, if a blind test finishes, for valid sequences failing to pass the CRC test, CRC-aided OSD (on-screen display) is used for further decoding partial candidate positions. By the aid of the blind test method, average blind test frequency of the system is lowered so as to improve system efficiency and decoding performance.