The invention discloses a phase-to-phase spacer galloping bearing simulation test method based on load equivalence. The method can realize load equivalence and galloping three-dimensional actuation form experiment simulation based on study of load variation characteristics of lines in actual galloping process and galloping action forms in a three-dimensional space; based on the information above,corresponding galloping bearing test procedures and test methods are established based on the load equivalence principle according to structural styles and connection characteristics of phase-to-phasespacers and according to action and reaction change features and influence thereof on wire node galloping forms of the phase-to-phase spacers under a galloping condition; and the method not only cantest fatigue tolerance characteristics of the phase-to-phase spacers under a long-term galloping condition, and meanwhile, combined with actual service conditions, can realize synchronous test of anti-preventing/ galloping-resistant characteristics of the phase-to-phase spacers, thereby realizing application performance evaluation under the galloping condition, and further improving authenticity and accuracy of the phase-to-phase spacers in galloping bearing simulation test.