The present invention discloses an infrared hand-held obstacle alarm mobile phone support. The infrared hand-held obstacle alarm mobile phone support is characterized in that when the support encounters the left, right or front obstacles, an integrated single-chip microcomputer drives an infrared diode of an emission terminal to emit the infrared light by an infrared emission drive circuit, when the infrared light is reflected back after encountering the obstacles, an infrared reception drive circuit drives a photosensitive diode of an infrared reception terminal to receive the reflected infrared light, and the infrared light is converted into a measureable voltage value U by the voltage conversion and by a formula U=k/S, wherein k is an verse proportion coefficient, a distance between the obstacle and a mobile phone user can be obtained, and when the distance is less than an alarm distance, the alarm information is sent out via an image in a mobile phone screen or/and via the sound of a mobile phone horn, thereby effectively avoiding accidents caused by watching mobile phones.