In the area where the geomagnetic change is slow, the one-dimensional geomagnetic matching navigation has a low matching probability and limited application range.Aiming at the problem, a multi-dimensional geomagnetic matching algorithm based on PSO is proposed for aircraft networking flight.Based on the single-dimensional geomagnetic matching model, a master-slave networking geomagnetic matching model is established.Using multiple aircraft space constraints, the average absolute error rule is extended from one-dimensional calculation to high-dimensional matching.The positioning effectiveness is evaluated from three aspects of successful matching rate, matching error and algorithm fitness.Simulation results show that the multi-dimensional geomagnetic matching can obtain higher matching probability and matching positioning accuracy in a short period, with a matching rate 10% higher than that of single-dimensional geomagnetic matching at the same matching point.