The invention relates to a hybrid power transmission line fault distance measurement method, a hybrid power transmission line fault distance measurement device and a computer storage medium. When a fault happens, from a sending end to a receiving end, measurement impedance of each section of a line is calculated orderly, and the measurement impedance is compared with the line section full-length impedance, thus, whether the fault is located in such section of the line can be confirmed, until the section of the line where the fault is located is confirmed, and finally, fault distance measurement is executed, wherein for a certain section of the line, according to voltage and current data of a front end of the previous section of the line and wave impedance and a propagation coefficient of the previous section of the line, the voltage and current data of the head end of such section of the line can be obtained through calculation, then, the measurement impedance of such section of the line is calculated according to the voltage and current data of the head end of such section of the line. So, the hybrid power transmission line fault distance measurement method can realize accurate locating of the fault, and compared with the conventional fault distance measurement method, the hybrid power transmission line fault distance measurement method provided by the invention can greatly improve fault distance measurement precision and reduce fault distance measurement errors when being used in a hybrid power transmission line.