Large plane strain test equipment

The utility model provides large plane strain test equipment, which comprises a container base, a sample base and a sample barrel, wherein the sample base is fixed on the upper part of the container base; the sample barrel is hermetically connected with the sample base; a sample is arranged on the sample base; two lateral panels are arranged in the short edge direction of the sample, the lateral panels and the sample are pre-fixed, the interiors of the lateral panels are contacted with the sample, and the exteriors of the lateral panels are sequentially connected with a lateral piston, a sensor and an adjusting rod respectively; the adjusting rods are connected on pressing end plates; four pull rods pass through the sample barrel and then are fixedly connected with the pressing end plates at two ends; an axial piston is arranged at the top of the sample barrel; and the axial piston is hermetically connected with the sample barrel through a sealing copper sleeve. The equipment enables the ambient pressure to m