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Electronically simulated LVDT sensor is widely used in the aviation engine test field, which lowered use difficulty and maintenance charge relative to mechanical sensor. Conventional simulator’s poor accuracy lowered the test accuracy because of transformers. So there are big engineering requirements in designing high-accuracy LVDT simulator. From LVDT simulator’s working principles, the paper realized to simulate LVDT sensor based on multiplying DAC chips. Simultaneously we designed auto-calibration unit and utilized fitting template curve to on-line calibration stored in FPGA, which eliminated the impact of amplitude-frequency response and increased simulation accuracy in wide frequency range. The validity of the template curve was proved by theoretical deduction. The excelled 0.1% design accuracy in 0.36~10 kHz range was verified by test data. The simulator can simulate LVDT sensor’s electrical character, which has been used successfully in some aircraft engine control system simulation test platform, achieving expected effect.