The invention discloses an electric equipment defect analysis method based on infrared detection. The method comprises the following steps that a selection frame is arranged in an infrared thermal imaging instrument, and infrared thermal imaging detection is carried out on a target electric power equipment by adopting the infrared thermal imaging instrument, and infrared thermal image graphs are collected; according to the infrared thermal image graphs captured in a selecting frame, and the equipment type of the target electric power equipment, the target electric power equipment is segmentedso as to obtain a plurality of equipment sections; the maximum temperature value of each horizontal coordinate in each equipment section is obtained; the temperature difference characteristic curve ofthe target electric power equipment is obtained according to all the highest temperature values; according to a preset judgment standard and the temperature difference characteristic curve, inter-phase transverse comparison is carried out on each equipment section so as to judge whether the target electric equipment has defects or not. According to the invention, the equipment value model can bequickly established and the equipment temperature distribution characteristics can be comprehensively reflected, and the equipment with hidden danger can be found out according to the accurate and intelligent ratio and the thermal defect of the equipment.