The invention discloses rubbish penetrating fluid and an urban sewage treatment device. The device comprises a disinfection and sterilization tank, a heavy metal separation tank, a secondary reactiontank and a precipitation tank, wherein the disinfection and sterilization tank, the heavy metal separation tank and the secondary reaction tank are all internally provided with stirring paddles whichare driven by a motor arranged above, the outer sides of the disinfection and sterilization tank, the heavy metal separation tank and the secondary reaction tank are respectively provided with a firstliquid storage bucket, a second liquid storage bucket and a third liquid storage bucket, in the second liquid storage bucket, a stirring paddle is arranged, a stirring motor is arranged above the second liquid storage bucket, the front end of the disinfection and sterilization tank is connected with an ammonia nitrogen air stripping tower, a water inlet is arranged above the ammonia nitrogen airstripping tower, a water outlet is arranged below the ammonia nitrogen air stripping tower, and the water outlet is connected to the disinfection and sterilization tank through a pipeline. The urban sewage treatment device can be used for achieving efficient and stable treatment of the filtration and decomposition of organic matter, nitrogen, phosphorus and heavy metal, and the discharge standardis met.