The invention discloses a heavy metal wastewater treatment method. The heavy metal wastewater treatment method is characterized by comprising the following steps: enabling heavy metal wastewater comprising tin-nickel-fluorine wastewater and ammonia-nitrogen wastewater generated in production to flow into a to-be-treated tank through different underground pipe networks; pumping wastewater in the to-be-treated tank into a wastewater collecting tank, mounting a perforation and aeration system on the upper position of the wastewater collecting tank, connecting the penetration and aeration system to an air blower, performing penetration and aeration on heavy metal wastewater for depositing suspended solids in water in a regulating tank, stripping a little ammonia nitrogen gas contained in the wastewater, enabling the regulating tank and the wastewater collecting tank to be in the same large tank, separating the regulating tank from the wastewater collecting tank by a partition wall, enabling height of the partition wall to be smaller than depth of the whole large tank, automatically flowing the penetrated and aerated water into the regulating tank from the wastewater collecting tank; and enabling water amount of the regulating tank to be smaller than one half of the size of the regulating tank.