This　paper　proposes　a　portable　ultrasonic　guided　wave　detector　based　on　ADLINK　COM　Express　(Computer　On　Module　Express)　computer　module.　This　detector　is　equipped　with　Windows7　operating　system　and　uses　the　PCIe　(Peripheral　Component　Interconnect　Express)　bus　as　the　FPGA　(Field　Programmable　Gate　Array)　of　COM　Express　and　Xilinx.　The　data　transmission　rate　can　reach　500MB/s　in　the　transmission　line.　In　addition,　a　self-developed　high-voltage　pulse　signal　generation　circuit　and　signal　acquisition　circuit　are　used　in　the　analog　circuit.　Finally,　this　developed　detector　is　used　to　excite　ultrasonic　guided　waves　in　the　aluminum　plate　and　the　pipe　to　realize　the　identification　of　defect　echo　signals　in　these　two　structures,　which　verify　the　reliability　of　the　designed　detector.