i was planning to visit shanghai and i wanna book hotel room near radio tower?

You must refer to the Oriental Pearl TV Tower. Well, the accommodations near the tower all are all a little expensive.

According to your demand, I just know the Hanting Express Hotel (Garden Bridge Branch) on the Bund more or less suits, but it costs CNY250-350 per night. If a cheaper one which is a little farther can be fine, the Dock Bund Hostel is recommended. It lies at no. 55, Hong Kong Road (near Middle Sichuan Road), around 500m from the Bund, where you can easily take certain transportation to the tower.