Disclosed is an optical fiber millimeter wave communication device based on double saw-tooth wave scanning, which relates to optical fiber communication field. The connection mode includes that: the output of a laser unit (1) is connected with the input of an optical splitter (2); two outputs of the optical splitter are respectively connected with the inputs of a first optical frequency modulator(31) and a second optical frequency modulator (32); the output end of a binary bit sequence generator (4) is connected with the input of a logic inverter (5); the output of the logic inverter (5) is connected with the input of an electrical splitter (6); two outputs of the electrical splitter are respectively connected with bit inputs of a post peak saw-tooth wave generator (7) and a leading peaksaw-tooth wave generator (8); the outputs of the post peak saw-tooth wave generator and the leading peak saw-tooth wave generator are respectively connected with the electrical signal inputs of the first optical frequency modulator and the second optical frequency modulator; the outputs of the first optical frequency modulator and the second optical frequency modulator are respectively connected with two inputs of an optical combiner (9); the output of the optical combiner is connected with the input of a photodiode (10). Based on the connection mode, the millimeter wave communication of binary bit data is realized.