The invention provides an extrusion process of 6063 aluminum alloy sections. The extrusion process comprises the steps of heating, extruding, withdrawing and straightening, sawing and aging aluminum alloy cast ingots, so that aluminum alloy sections are obtained, wherein the temperature of an extrusion container is 450 to 460 DEG C, and the speed of an extrusion shaft is 0.8 to 2 mm/s in an extrusion process. According to the extrusion process, the extrusion temperature and the extrusion speed in the extrusion process are strictly controlled, so that the prepared 6063 aluminum alloy sections have good mechanical properties such as yield strength, tensile strength and percentage elongation after fracture. The extrusion process of the 6063 aluminum alloy sections is especially suitable for preparing all-aluminum body sections in complex shapes and with multiple mold cavities.