The invention discloses an explosion-loading reflection-type caustic experimental method. Through mirror processing and grooving blasting hole design of a non-transparent material, the explosion-loading reflection-type caustic experimental method realizes accurate control of extension directions of cracks produced by explosion and then provides convenience for observation and recording of crack extension routes. Through a frame for explosive loading in a reflection-type caustic experiment, explosive loading and fixing of a test piece are stable; light path adjustment is convenient; and multi-angle and multi-direction adjustment on the test piece is realized. Under an explosion load, the explosion-loading reflection-type caustic experimental method for a non-transparent solid medium can record directly information of a stress concentration area of tips of cracks produced by explosion, and behavioral parameters of crack extension. Therefore, the explosion-loading reflection-type causticexperimental method provides favorable basis for tests of an explosion cracking mechanism and dynamic mechanical property parameters of a material.