The utility model discloses a device for measuring the center distance of a hole, and belongs to the field of data measuring tools. The device for measuring the center distance of the hole comprises acaliper main body, a digital display sliding block is arranged on the caliper main body, and the digital display sliding block can horizontally slide along the caliper main body; the device comprisesa first positioning block, a first jackscrew, a first connecting rod and a first cone clamping jaw; a second connecting rod and a second positioning block. According to the utility model, the cone jack catch is concentric with the measured circular hole, so that secondary calculation of measured data is not needed, and data acquisition is more intuitive; the hole diameter difference between the round holes can be ignored, and the accurate hole center distance can be directly obtained; the center distances of the circular holes with different hole diameters can be measured directly without calculation or even without knowing the hole diameters.