The utility model discloses a flexible cable rapid installation mechanism for a wave glider. The mechanism comprises a semicircular handle, a switch limiting block, a circular shaft, a lever clamp, arotating shaft, a magnet shell, a magnet, a cable joint, a main shell and an auxiliary shell, the switch limiting block moves upwards along a guide rail of the switch limiting block, and the lower endof the lever clamp is opened due to repulsive force of the magnet to realize disassembly of the cable joint; the main shell and the auxiliary shell limit the opening position of the lever clamp; theswitch limiting block moves downwards to press the top end of the lever clamp; the lower end of the lever clamp is closed due to compression of the top end; the switch limiting block moves downwards to a limit position, the positioning screw is screwed in, the closing state of the lower end of the lever clamp is locked, and installation of the cable connector is achieved. The device has the advantages that the installation accuracy and stability of the cable joint are realized; a cable passing channel is reserved for limiting the position of the cable and protecting the cable; and the cable joint can be assembled and disassembled through simple operation.