The invention relates to an independent barrier gate system. The independent barrier gate system comprises an overground portion, a ground portion and an underground portion. The overground portion comprises a barrier gate, a support base, a movable clamping groove, a spring and a time-delay relay. The ground portion comprises a plate, first slopes, second slopes and sliding devices. The underground portion comprises a driving rod, a pulley block, a steel wire, a spring and vertical fixing rods. The barrier gate is located above the uphill of the plate, and the plate is connected with the ground through the vertical fixing rods. The spring is arranged below the plate. The driving rod is connected with the plate and the steel wire. The steel wire passes the pulley block to be connected with the barrier gate through the movable clamping groove. The support base and the clamping groove are positioned below the barrier gate to enable the whole device in a linkage state. The first slopes and the second slopes are connected to the downhills of the plate, are connected with each other through the sliding devices, and can be in a relatively sliding state. The independent barrier gate system has the advantages of simplicity, practicability, low cost, high practical value and promotional significance.