P-y curve unit testing device and method

The invention relates to the field of single-pile foundation horizontal force characteristic analysis test, in particular to a p-y curve unit testing device and method. An upper supporting layer boardis located above a lower supporting layer board, the upper supporting layer board is fixedly connected with the lower supporting layer board through symmetrically arranged truss brackets located on the left side and the right side, at least one truss bracket is arranged on each side, a sample container, a servo consolidation mechanism and multidirectional servo actuators are correspondingly connected with the truss brackets on the two sides, the servo consolidation mechanism is located above the sample container, and the multidirectional servo actuators are arranged above the servo consolidation mechanism and below the sample container. The translation of pile units is realized by simultaneously applying loads with same the size up and down, so that the load-bearing condition of a certainsoil mass unit is simulat