Packer testing device and method

The invention provides a packer testing device which comprises a shaft body and a testing tool arranged in the shaft body, the testing tool comprises a tool center pipe, and an upper open hole packer and a lower open hole packer are arranged on the tool center pipe; the pressurizing device is arranged on the shaft body, and the pressurizing device is constructed to be capable of applying pressure to the interior of the shaft body; wherein the inside of the shaft body is divided into an upper space, a middle space and a lower space, and the pressurizing device is respectively communicated with the upper space, the middle space and the lower space. By means of the testing device, the working conditions of the upper packer and the lower packer bearing different pressure differences in the stages of sliding sleeve opening, fracturing construction displacement, sand adding and the like of the segmented open hole seal can be grasped in a targeted mode, the reliability of a tool is improved, the construction success