Infusion apparatus capable of accurately adjusting flow velocity

The utility model discloses an infusion apparatus capable of accurately adjusting flow velocity. The device comprises an injection needle, an infusion tube, a bottle stopper puncture device, a flow velocity regulator and a drip cup, the flow velocity regulator comprises an upper cover body, a regulating rotating wheel and a lower cover body, the regulating rotating wheel comprises an annular through hole and is fixed between the upper cover body and the lower cover body through a rotating shaft hole, and the hole diameters of the annular through hole are sequentially increased; a fixing assembly is connected to the bottle stopper puncture device and comprises a first fixing part connected to the bottle stopper puncture device, a second fixing part used for being detachably connected with an infusion bottle and a flexible connecting part. The flow area is changed by rotating the annular through holes of which the hole diameters are gradually increased in sequence, so that the effect ofaccurately adjusting the