Test auxiliary device for testing tensile strength of rock through Brazilian test

The present invention discloses an auxiliary device for testing test Brazil and France tensile strength of rock, rock mechanics test involving technical field, comprising a base (1), the spacer (2), the mat strip (6), an underlying article ( 7), the column (4), spacers (3) and a spring (5). The present invention is of simple structure, clever design, trapezoidal design of the interior hollow spacer through the pad acting on cylindrical specimens and the test piece is moved downward with its own weight into the spacer, the position adjustment of the specimen, until the bottom of the specimen in contact with the underlying stabilizing bars, automatic commissioning end position of the specimen, without human debugging, although the spacer in contact with the specimen before the test, play a regulatory role in leading position, but the force with respect to the start of the test after the force is negligible, test data accurate positioning accurate, error is small, easy accessibility, without human testing, improve test efficiency.