There is no fixed requirement for running or jumping rope first, you can choose according to your own situation and preference.
Running first can be, because running is generally not a large range of motion, running for a period of time can increase the cardiopulmonary function, accelerate blood circulation. Relaxation of calf local muscles, running for a period of time after there is no obvious fatigue, the whole body muscle relaxation can then jump rope, so more relaxed.
You can also jump rope first after jumping on a period of time, the calf muscles will be significantly relaxed, but the exercise time can not be too long easy to strain pain, if then running is more prone to fatigue, calf muscles are prone to fatigue, spasms, there may be the phenomenon of leg cramps.
So first run or first jump rope according to their own habits, avoid too much exercise intensity.