The line of SIUI calibration blocks includes step block, calibration block No. 1(V1), calibration block No. 2(V2), phased array test block type A, phased array test block type B, DC distance calibration block, SC sensitivity calibration block, DS distance/ sensitivity calibration block, RC resolution calibration block, IOW beam profile block, ASME basic calibration blocks, ASME basic calibration blocks for pipe and ASTM area/ amplitude, which can meet different standard and satisfy different ultrasonic applications.