The invention discloses an inter-operator interference coordination method for use in a co-primary spectrum sharing scene. The method comprises the following steps that: a first network negotiates an inter-operator sharing frequency band with a second network, wherein the sharing frequency band is also in a sharing spectrum pool; the first network assesses inter-operator interference; the first network judges whether to execute internal coordination or not, and if so, the first network executes the internal coordination and returns to the step that the first network assesses the inter-operator interference; if not, the first network makes a request for inter-operator interference coordination to the second network, and enters a next step; the second network judges whether to execute the internal coordination or not, and if so, the second network executes the internal coordination, and returns the step that the first network assesses the inter-operator interference; and if not, the second network returns to the step that the first network negotiates the inter-operator sharing frequency band with the second network. Through adoption of the inter-operator interference coordination method, the network interference coordination in the co-primary spectrum sharing scene can be realized fairly and reasonably.