In order to solve the problem that the number of high-quality frequency standard for atomic clock output is too few, and in view of the demand for high-quality frequency standards for space electronic systems, this paper designed a novel space power divider based on the Allied Standard Avionics Architecture Council (ASAAC) standard. The design idea of power division first and then isolation is adopted, it not only has the distribution function of frequency reference signals, which can output 12 frequency standards with high isolation. But also the fault detection and communication functions can be realized by adding the control module and design of the built-in test system. In addition, the module adopts the main and backup design, which improves the reliability of the product. The switch of main and backup is completed by the output compare (OC) instruction. The LRM connector is used to realize the rapid plug-and-pull replacement of the module and enhance the maintainability of the module. Finally, Through theoretical analysis and measurement results, the isolation is better than 72 dB, the output power is greater than 6 dBm, the harmonic is better than -62 dBc, and the clutter is better than -90 dBc (within 200 MHz), which verifies the feasibility and effectiveness of the product.