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In order to realize the accurate positioning of the transmitted data information, a synchronization control system of LEO satellite mobile communication based on orthogonal frequency division multiplexing is designed. Set up the power management module, initially coordinate the bdg-mf-os satellite terminal and ZigBee wireless data transmission module, feedback the satellite communication information to the network and display module, and realize the hardware design of LEO satellite mobile communication synchronization control system. Establish the synchronous signal model, improve the multiplexing protection interval and cyclic prefix of the communication information to be processed through signal modulation and demodulation, and realize the key technology research of orthogonal frequency division multiplexing processing. With the help of the known short message communication mode, the synchronous communication protocol is connected to complete the synchronization control of LEO satellite mobile communication. Compared with the Beidou communication control system, the mobile communication capability of LEO satellite is strengthened under the effect of orthogonal frequency division multiplexing technology, which can better meet the practical application requirements of accurate positioning and transmission of data information.