The utility model relates to an automatic dustproof water curtain device for an adhesive tape transportation roadway. The automatic dustproof water curtain device mainly comprises a load detection mechanism, an infrared sensor monitoring system, a current transformer and a spraying system, wherein the load detection mechanism presses a trough idler by virtue of cargos on an adhesive tape, and then presses a support rod and a pressure plate under the trough idler and touches a travel switch under the pressure plate; the infrared sensor monitoring system judges whether a person passes through by infrared sensors at two sides of an adhesive tape machine head and transmits a signal to a controller to further control on and off of a solenoid valve to start/stop the spraying operation; and one end of the current transformer is connected with the load detection mechanism by a direct-current stabilizer, and the other end of the current transformer is connected with the spraying system. The automatic dustproof water curtain device for the adhesive tape transportation roadway solves the problems that the spraying equipment of the adhesive tape machine for the existing long-distance adhesive tape transportation roadway is controlled to be on and off manually, the dustproof device is switched on and off untimely and the dust falling effect is not ideal.