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The low control rate of the proposed inter satellite communication link control system for LEO Spacecraft leads to poor response ability of pitch angle and azimuth angle, and large error of angular velocity, angular acceleration and angle direction. In view of the above problems, a new LEO Spacecraft inter satellite communication link control system is designed based on Geo. The inter satellite communication link of LEO Spacecraft is analyzed. The data coding and data transmission mode are determined by using inter satellite signal transmitter, signal receiving sensor, transmitting antenna, receiving antenna and high gain antenna. The satellite ground link protocol control program and the inter satellite link protocol control program are designed respectively to realize the control between the protocols. The experimental results show that the LEO Spacecraft inter satellite communication link control system based on geo has high control rate, strong response ability, strong control parameter robustness, and can effectively reduce the errors of angular velocity, angular acceleration and angle direction.