The invention discloses an electromagnetic relay return coefficient test platform and test method. The test platform comprises a base plate which is provided with a plurality of sets of relay wiring modules, a first test binding post, a second test binding post and a power supply; each set of relay wiring modules comprises a wiring board, a first relay binding post, a second relay binding post, a third relay binding post, a fourth relay binding post and a light emitting diode; the wiring board is provided with a first coil pin slot, a second coil pin slot, a third coil pin slot, a fourth coil pin slot, a first normal open pin slot and a second normal open pin slot. A current relay return coefficient test method and a voltage relay return coefficient test method both employ the test platform. The test platform facilities exchange of a coil connection mode, thereby improving test efficiency; besides, the test platform is fast to test.