In order to verify the stress occurring to steel beams caused by blast wave, through analyzing how to improve or reinforce the structure of steel beams, a multi-channel low-power storage test system based on right angle strain rosette was proposed; a large number of feasibility simulation tests and reliability tests were carried out. In the blast wave experimentation, the stress of steel beams caused by blast wave was actually tested by arranging a number of measuring points in the field, experimental data was analyzed and processed and overall parameter and distribution rules of the stress of steel beams caused by blast wave were obtained. The experiments show that the test system is suitable for the explosion tests with poor environmental conditions.