The invention discloses a multi-functional infrared photoelectric detector. An advanced infrared photoelectric synchronous control technology is adopted, imported integrated chips are selected and used, unique circuit design is conducted, and multiple ways of the infrared photoelectric detectors can work simultaneously without interference. The detector has the characteristics of being high in sensitivity, high in precision, high in reliability, suitable for various severe environments and the like, is convenient to change and maintain on site and can meet requirements of infrared photoelectric detection of high-speed automatic production lines, and meanwhile, online program control on the multiple ways of the infrared photoelectric detectors is facilitated.