The invention relates to a resistance type cable force measuring device and method, relates to the technical field of resistance measurement, and aims to the problem that e existing cable force measuring methods are easily affected by external environment, resulting in impossibility of obtaining accurate cable force values. The device comprises a plurality of conductive buckles, two measuring wires, a thermistor and a data collector, wherein the plurality of conductive buckles are radially spaced along the cable axis on the outer surface of the cable, each conductive buckle is separately connected to two adjacent steel wire bundles in the cable such that a plurality of consecutively arranged steel wire bundles are connected in series as a cable measuring unit through the conductive buckles, one ends of the two measuring wires are connected to the two conductive buckles at both ends of the cable measuring unit, and the other ends are connected to the data collector, the thermistor is installed on one measuring wire, the data collector collects the resistance values of the cable measuring unit and the thermistor, thereby calculating the cable force based on deriving the relationshipformula between the cable resistance and the cable force and combined with the resistance values before and after the cable stretches.