In order to solve the problem of electro-hydraulic servo system as looding equipment in the low cycle cyclic loading test of the ancient building wooden frame,a loading system with low cycle load test was developed.By controlling the distance between the two “knife mouths” of the double knife mouth support of the plane swing column and the distance from the ear plate hole to the center axis of the plane swing column,a kind of synchronous loading device for the large displacement low cycle reciprocating load test of the old construction wood frame was realized.The device overcomes the load error of the loading device on the test object,and provides a new loading equipment for the low cycle reciprocating load test of the ancient timber structure.