The invention provides a bidirectional micro-friction load force transmission plate for a soil engineering true triaxial test. Bidirectional micro-friction load force transmission plates are arranged on the two sides of a test sample when used in the true triaxial test. The bidirectional micro-friction load force transmission plate for the soil engineering true triaxial test comprises a rectangular carrying plate. A rolling shaft row capable of rolling in the sigma 1 direction is arranged on the upper portion of the rectangular carrying plate, and first sliding strips, second sliding strips and a third sliding strips are circularly arranged on the rolling shaft row in the sigma 1 direction in sequence. Sliding blocks are arranged on the first sliding strips, the second sliding strips and the third sliding strips in the sigma 3 direction of the rectangular carrying plate in sequence and can freely slide on the first sliding strips, the second sliding strips and the third sliding strips in the sigma 3 direction. A rectangular contact plate with the dimension larger than that of the test sample is formed by the sliding blocks on the first sliding strips, the second sliding strips and the third sliding strips, and the rectangular contact plate is used for being in direct contact with the test sample. By means of the bidirectional micro-friction load force transmission plate, the bidirectional free deformation of the test sample on the contact face in the true triaxial stress state can be achieved, and the problem that the friction resistance of the contact face of a loading plate and the test sample is too large is effectively solved.