The invention relates to an inflow uniqueness detection device and method based on low-frequency triggering, and the device comprises an RF controller, a control computer, an RF low-frequency trigger,an iris recognition machine, a gate, a display card and a voice broadcast. When a person gets close to the iris recognition machine, the transmitting card that is carried around is activated and received by the RF controller to start to scan the iris. After the comparison is successful, the personnel information is sent to the RF controller, which respectively sends a control command to the gate,the display card and the voice broadcast by combining the received RF information. The invention solves the problems of difficulty in controlling the receiving distance of the inflowing uniqueness detection signal of the current coal mine and the slow passage speed, and solves the inflowing problems of personnel positioning replacing cards, multiple carrying cards and no-carrying cards. The RF controller and RF low frequency trigger are designed with a RF receiving distance controlled within 1 meter, which solves the current problem of radio frequency incorrect reception when coal mine personnel line up to enter the well, controls the single-pass time within 2 seconds, and improves the speed of inflow passage.