The utility model relates to an interchange resistance measurement system and fixer of transmission pressure. The system includes alternating current power supply, voltage electric current collectionequipment and fixer, the fixer adopts insulating material to make for fix the interval of the transmission pressure that awaits measuring of two parallels and setting for the within range, the returncircuit that two line transmission line knot of the parallel that the transmission pressure that awaits measuring of two parallels is configured as construct, alternating current power supply be usedfor successively to the not alternating current of equidimension is imported respectively in the return circuit, voltage electric current collection equipment is used for measuring under the differentalternating current input condition the voltage drop in return circuit and the electric current that flows through, and be used for with voltage drop and electric current signal transmission give theterminal equipment who connects with it. The utility model discloses simple structure easily realizes, and the measuring result degree of accuracy is high.