An embodiment of the invention provides a cable pressure monitoring method and a cable pressure monitoring system. The cable pressure monitoring method is applied to the cable pressure monitoring system and includes: sleeving a cable with an electric heating device; allowing a pressure detection device to detect the pressure value between the detected cable and a telegraph pole and send the pressure value to a monitoring device; the monitoring device judging the size of the received pressure value and a preset pressure value, and if the pressure value exceeds the preset pressure value, generating a first control signal and sending to the electric heating device to execute snowmelt operation. With the method, accumulated snow or ice on the surface of the can be quickly melt in cold weather, and the problem about cable breakage is effectively solved.