A signal transmission apparatus is provided in the present disclosure, including: a substrate, and a BLUETOOTH antenna and WI-FI antennas which are provided on a same side edge of the substrate. At least two branches of the WI-FI antennas are provided, and the BLUETOOTH antenna and the WI-FI antennas are provided at intervals. According to the present disclosure, the BLUETOOTH antenna and the WI-FI antennas are provided on the same side edge of the substrate, and the BLUETOOTH antenna and the WI-FI antennas are provided at intervals, so that all the antennas of the signal transmission apparatus are provided at an edge of a terminal board, thereby facilitating signal transmission and solving a problem in the prior art that the BLUETOOTH antenna and the WI-FI antennas are respectively provided on two side edges of the substrate, affecting data transmission.