The invention discloses a cable testing method of a quick connector. The cable testing method comprises the steps of a four-core cable testing step, a six-core cable testing step and a ten-core cable testing step. According to the cable testing method of the quick connector, through setting the four-core cable testing step, the six-core cable testing step and the ten-core cable testing step, testing of a four-core cable, testing of a six-core cable and testing of a ten-core cable can be effectively finished, thereby realizing higher speed and higher convenience than a manner through a universal meter in prior art.