This invention relates to the field of cable testing technology, specifically a cable connection testing device for
flame-retardant cable installation, comprising: a base plate; a positioning and guiding mechanism, wherein the positioning and guiding mechanism for positioning and guiding the cable under testing is disposed at the top of the base plate; a testing mechanism, wherein the testing mechanism for testing the
surface flatness of the cable is disposed at the top center of the base plate; and a cleaning mechanism; the guiding component in the positioning and guiding mechanism of this device can be freely adjusted according to the cable specifications, enabling better guidance of the cable, while the positioning component can center the cable, ensuring that the cable is in a centered state during testing, thus improving the accuracy of testing; under the action of the transmission component, the cleaning component can rotate synchronously with the guiding component, allowing the cleaning block to rotate and clean, preventing dust and impurities on the cable surface from affecting the testing of the cable
surface flatness.