The invention relates to a multi-purpose portable test block for ultrasonic detection. The test block has a ship type structure, and consists of a test block body and a test block boss arranged on thefront of the test block body. A ship head part at the left of the test block is composed of two concentric arc surfaces with different radiuses, and the right half of the test block is composed of anarc surface and a transverse through-hole. The test block not only can measure a probe incident point, a K value, sound velocity, horizontal linearity, vertical linearity, dynamic range and probe double peaks, and has the characteristics of convenient manufacturing, easy carrying, small size and the like, and simultaneous calibration of the probe K value and sound velocity by one measurement, canreduce instrument and probe system regulation procedure, and greatly improves the detection efficiency.