The invention discloses a production method of an anti-corrosion aluminum alloy for a complex heat conduction system. The method comprises the steps of A1, smelting and casting; A2, homogenizing cast ingots; loading the cast ingots to a heat treatment furnace; maintaining the temperature for 6-8h at 560 DEG C; discharging from the furnace, and quickly cooling the cast ingots to room temperature; A3, extruding: during flat-die extrusion, controlling temperature of the cast ingots to be 480 DEG C, heating temperature of an extrusion barrel to be 440 DEG C, die temperature to be 490 DEG C and sectional material outlet temperature during the extrusion to be about 510 DEG C; cooling the sectional material by a fan in a top and bottom forced cooling mode to be less than 200 DEG C to prevent strengthening phase from being separated out; A4, performing ageing process: loading the sectional material in an ageing furnace, performing ageing for 6h at 180 DEG C, cooling to room temperature with the furnace and then discharging the product from the furnace. The production method of the alloy is free from pollution and is low in cost; the produced aluminum sectional material has the advantages of stable heat conduction performance, high surface quality and good corrosion resistance, is suitable for commercial production and can replace prior normal heat-conducting aluminum alloy material.