The invention discloses a multi-spectrum invisible anti-counterfeiting identifier and a detection device thereof, and a detection method thereof. The multi-spectrum invisible anti-counterfeiting identifier comprises an infrared absorption anti-counterfeiting pattern region made of infrared absorption ink, a macroscopic region made of common ink, and an ultraviolet excitation anti-counterfeiting pattern region made of ultraviolet excitation ink. The detection device is composed of a multi-spectrum micro-lens imaging unit and an image analysis unit; the multi-spectrum micro-lens imaging unit consists of a multi-spectrum micro-lens imaging lens, a mounting bracket, a full-spectrum light source, a CMOS sensor, and a focusing mechanism; the multi-spectrum micro-lens imaging lens is installed on the mounting bracket; the full-spectrum light source is installed on the mounting bracket; and the CMOS sensor is installed on the focusing mechanism. The multi-spectrum invisible anti-counterfeiting identifier has characteristics of good multi-anti-counterfeiting capability, high anti-counterfeiting level, high security and reliability, and good anti-counterfeiting effect. The anti-counterfeiting technique has the important application values in bill, currency, certificate, commodity, military, and security information fields.