The invention relates to the field of
data transmission, in particular to a one-way
data transmission device which comprises a
data transmission chamber and an
optical disc recycling bin communicated with the data transmission chamber through an
optical disc recycling opening. The data transmission room is provided with an external network unit, an internal network unit, a transfer bin and a
signal transmission module; the external network unit is used for reading data from an
external storage medium, recording the data in a pre-stored optical disk, transferring the optical disk to a transfer bin, and triggering the
signal transmission module to send a
signal to the internal network unit; and the
intranet unit is used for transferring the
optical disc in the transfer bin to the preset CD driver according to the signal, reading data from the optical disc in the preset CD driver, and transferring the optical disc from the preset CD driver to the optical disc
recovery port. An absolute physical isolation barrier is established between the internal network and the external network, one-way, automatic and safe ferrying of data from the external network to the internal network is achieved, the risk of data leakage is effectively eradicated, and the safety and reliability of data transmission between computers of the internal network and the external network are improved.