Astronavigation cable assembly protection device and preparation method thereof

The invention provides an astronavigation cable assembly protection device and a preparation method thereof. The astronavigation cable assembly protection device comprises a printed board, a protective shell and a protective sleeve, wherein the printed board is a surface-mounted bonding pad printed board and comprises N pairs of interconnected surface-mounted bonding pads, and lead wires in a first cable and a second cable which need to be interconnected are pasted and welded on the corresponding surface-mounted bonding pads of the printed board, so that electrical performance connection between the lead wires is realized; n is greater than or equal to the maximum number of the lead wires in the interconnected first cable and second cable; the printed board welded with the lead wires is packaged in the protective shell, the first cable and the second cable extend out of a wire outlet of the protective shell, and the protective shell fixes and protects the printed board and the connecting lead wires; and the p