If i reach Pudong Interantional Airport after 24.00. What should i do to enable me to go hangzhou?

Well, if you still wanna go to Hangzhou after the midnight, you need to take a taxi from the airport and get to South Railway Station first. It takes around 40 mins on the way.
Then there are several normal speed trains that can take you to the destination. The suitable schedules are 02:14, 03:30 and 04:07. The duration is about 2.5 hours. Soft seat costs CNY39.5 and hard seat costs CNY24.5.