The invention relates to a performance test fixture of a piezoelectric ceramic actuator. A fixture body is fixed at a support with an adjustable height; and a fixture end cover is installed at one end of the fixture body. A workpiece can be clamped inside a workpiece support frame and installed in the fixture body; axial centering of the workpiece is realized by the support frame; a pre-tightening bolt at the other end provides a pre-tightening force to clamp the workpiece tightly and then the pre-tightening bolt is screwed to provide a compression force so as to compress a piezoelectric ceramic actuator.; and a compression value is read by a dividing ruler. According to the invention, the performance test fixture has advantages of simple structure, complete functions, convenient usage, and high reliability and is capable of clamping a piezoelectric ceramic actuator based on a cylindrical or polygonal structure with a certain dimension range.