I reach shanghai pudong at 1am want to go to Linyi by bus or train same night pls guide

There is only one train from SH to Linyi leaving at 13:00, so you can only choose to take bus.
There is no night bus to Linyi. It is suggested you take a rest in the hourly lounge at T2 and take the earliest bus line 5 to SH Railway Station at 6:30. Upon arrival, go to the northern square of the train station to find the long-distance bus station. There, you can take a coach to Linyi.