The reciprocating motion of linear generator is a special form of motion. The traditional generator test platform is not suitable for the test of linear generator. For this situation, the design scheme of linear generator test platform is introduced. The platform adopts modular design, including servo motor system, sensor system, data acquisition card and PC program. The servo motor system includes track guide, rack, pinion and servo motor with its controller; the sensor system includes three-phase voltage and current sensor, thrust sensor and position sensor; the data acquisition card adopts ALT-USB2811; the PC program is write in C. Through the cooperation between the each parts, the platform can drive the linear generator to achieve the collection, calculation, display and storage of the main parameters. This program has certain reference value for the testing of linear generators.