Advanced treatment system for metal surface treatment wastewater

The utility model discloses an advanced treatment system for metal surface treatment wastewater, which comprises a physicochemical reaction unit, a biochemical reaction unit, a membrane treatment unit and an evaporation treatment unit which are sequentially communicated, and further comprises a photovoltaic power generation system which is arranged above the physicochemical reaction unit, the biochemical reaction unit, the membrane treatment unit and the evaporation treatment unit. The photovoltaic power generation system comprises a photovoltaic module, a storage battery, a charging and discharging controller and an inverter, the evaporation treatment unit comprises an evaporation tank, an evaporator, a condensation tank, a condenser and a steam compressor connected between the evaporator and the condenser, and the photovoltaic module, the inverter and the steam compressor are electrically connected in sequence; the photovoltaic module, the charging and discharging controller and the storage battery are elec