The invention relates to an aluminium alloy forged piece and a manufacturing process thereof. The manufacturing process for the aluminium alloy forged piece comprises the following steps: heating an aluminium alloy cast ingot and preserving the heat, wherein components of the aluminium alloy cast ingot are the same with those of a 6061 alloy, and the difference is that content of copper, zinc, titanium and chromium is increased; heating an extrusion mould and an extrusion barrel, and extruding the heated cast ingot into a section bar; straightening after the section bar is cooled to a temperature lower than 50 DEG C, and saw-cutting the straightened section bar to form forged blank; heating the forged blank, and preserving the heat; pre-heating a forging mould, and forging the heated forged blank into a mould forged piece semi-finished product; and performing quenching, tempering and ageing treatment on the mould forged piece semi-finished product to obtain the aluminium alloy forged piece. The aluminium alloy forged piece has excellent comprehensive performance, has tensile strength higher than or equal to 360 MPa, has specified non-proportion extension stress higher than or equalto 340 MPa, has elongation higher than or equal to 16%, and has Vickers hardness higher than or equal to 150 HV.