The invention discloses a QPI (Quick Path Interconnect) bus signal integrity testing method. The QPI bus signal integrity testing method comprises the following steps: firstly, additionally arranging a CPUXDP (Central Processing Unit XML Data Package) interface on a machine to form a complete QPI data acquisition circuit trough the interface; connecting testing software with a tested platform by a USB-XDP3 (Universal Serial Bus-XML Data Package 3); if a testing result is Pass, showing that the connection is correct; if the result is Fail, needing to repeatedly confirm; then automatically carrying out Margin acquisition of Voltage and Timing by the testing software; after the acquisition is finished, displaying Complete; and after the testing, deriving the testing result, wherein the test passes when the margin of the Voltage is more than or equal to 15.7 and the margin of the Timing is more than or equal to 10.25. According to the testing method disclosed by the invention, errors caused by manual operation are reduced and the testing accuracy is improved; and the repeated operation is avoided and the testing efficiency is improved.