Module cable for photoelectric transmission, cable connecting piece and cable connecting assembly

The invention belongs to the technical field of photoelectric transmission, and particularly relates to a module cable for photoelectric transmission, a cable connecting piece and a cable connecting assembly. The cable core structure of the module cable comprises a wireless transmission channel, an electric transmission channel and an electromagnetic shielding layer; when the module cables are connected, the first module cable section and the second module cable section have the same cable core structure and are provided with a first connecting device and a second connecting device which are matched with each other; during connection, the first module cable section is connected with the second connecting device of the second module cable section through the first connecting device or the first module cable section is connected with the first connecting device of the second module cable section through the second connecting device; the problems that in an existing artillery, cable splicing is difficult, cable