The invention provides a switching device and a current mode digital-to-analog converter with the same. The switching device comprises a first switch and a second switch, wherein the second switch is connected with the first switch in parallel; the type of the transistors of the first switch is the same as that of the second switch; and the control signal of the first switch complements the control signal of the second switch. By adding a parallel switch to a traditional switch and using the complement control technology of the inveniton, the invention improves the isolation between the switch control signals and the signal passages, and applies the technology to the digital-to-analog converter to improve the dynamic characteristic and the frequency-domain characteristic of the digital-to-analog converter.