The invention discloses a foam lead grid resistance testing device and method. The device comprises a multimeter, a to-be-tested foam lead grid, a battery charger/discharger and a battery; one end ofthe battery is connected with a connecting part of the foam lead grid through a connecting line with a clamp, and the other end of the battery is connected with the battery charger/discharger, the battery charger/discharger is connected with a tab of the foam lead grid through the connecting line with the clamp, two monitoring probes of the multimeter are respectively connected with the tab and aconnecting point. The testing device disclosed by the invention can conveniently test resistance on each location of the foam lead grid, and provides the basis for the grid design and the grid preparation, and the performance of the battery can be effectively improved.