The invention relates to a cable protection method, belongs to the technical field of coal mining, and in particular to a cable protection method for signal transmission of a coal mine underground floor water disaster monitoring system. The method mainly comprises the protection of three key parts: a foundation protection platform is built at a drilling opening, a cable is excavated through a tunnel and pipe-through burying, and the upper wall of the cable is hung with the height design, so that a transmission cable can be prevented from being damaged by stratum stress and mechanical stress effectively.