Portable field rock flexural-tensile strength tester

The utility model discloses a portable on-site rock flexural-tensile strength tester which comprises a fixed plate, the fixed plate is fixed on a base, the front surface of the fixed plate is connected with a movable plate through a fixed bolt, a test piece is fixed between the fixed plate and the movable plate by rotating a nut on the fixed bolt, and the fixed plate is fixed on the base. The same side faces of the fixed plate and the movable plate are each fixedly provided with a limiting stopper, a limiting bolt is arranged in each limiting stopper, the test piece limiting plate is placed on the test piece, and the limiting bolts abut against the test piece limiting plate; a hand-operated horizontal jack with a pressure gauge is also arranged on the base; and the hand-operated horizontal jack is propped against the lower part of the test piece. The test instrument is portable and can be used for field measurement; quantitative indexes are adopted to judge the hardness degree of the rock, human factor interf