What is the best way to put political activity into your college app?
political activities like:
Working in Campaign of XX to elect as a senator: phone banking, card writing
cofounder of young democratic socialist party in our area
Working in the campaign of Judge in our area
working on voter registration
Are those activities, good for your resume? how to present those?
First, add it to your extracurricular activities section. If you choose to write about it in your essay, be careful. The AdCom might throw your essay in the rejected pile if they find your essay to be a political manifesto that disagrees with their political view. Try to inject as little of your political opinion as possible. Instead, write about how the experience changed you/open your eyes to the world/etc.
You could add them to the activity section of the Common App. Since you have so many, I would recommend using the Common App over other versions as it gives you up to ten spaces to add activities; Colatlition only has 5 I think. It could also make a good essay opportunity. As for whether it is "good" not, I don't think there are good or bad extra curriculars. If you enjoyed doing it, made some type of impact (it sounds like you did), and did it for fun rather than just for the clout you should be fine. Best of luck!