Method and device for evaluating interference between constellation systems

The embodiment of the invention provides a constellation inter-system interference assessment method and device, and the method comprises the steps: carrying out the first joint spatial position distribution of a disturbed constellation system and an interference constellation system, and carrying out the first joint spatial position distribution of a pre-determined first same-address earth station; determining disturbed satellites and interference satellites capable of establishing communication links from the disturbed constellation system and the interference constellation system respectively; determining the sum of the interference power of the links established by the interference satellites to the links established by the interfered satellites, and determining the maximum value of the sum of the interference power as the downlink set total interference power of the first in-site earth station under the first joint spatial position distribution; and determining a cumulative distribution function of the d