The invention discloses a low-temperature distressing thermal treatment process for a precise cold-rolled extremely-thin stainless steel strip. The low-temperature distressing thermal treatment process comprises the following steps of 1) selecting a finish-rolled finished product steel coil, wherein flatness of the selected steel coil is 1.0-1.5mm; 2) carrying out stretch-bending straightening treatment: carrying out constant-stretching-mode stretch-bending straightening on the selected steel coil, and finally controlling the flatness of the steel coil to be 0.30-0.50mm; 3) carrying out low-temperature thermal treatment: carrying out low-temperature distressing thermal treatment on the steel strip subjected to the stretch-bending straightening treatment at a thermal treatment temperature being 400-780 DEG C, and adopting protective gas in a low-temperature thermal treatment process; and 4) carrying out low-tension coil separating. The low-temperature distressing thermal treatment process for the precise cold-rolled extremely-thin stainless steel strip disclosed by the invention adopts the process technical scheme of removing internal stress generated by steel strip rolling and follow-up stretch-bending straightening through low-temperature thermal treatment, so that when the precise cold-rolled extremely-thin stainless steel strip which is used for parts of tablet personal computers, keyboard back boards, middle boards/backboards of mobile phones and the like is subjected to stamping forming and chemical corrosion, deformation is not liable to cause.