The invention relates to a fieldbus control device and a control method in the extrusion production field of rubber sealing strip which belongs to the technical field of industry control; the device comprises a master station controller, a fieldbus communication module of a master station, a fieldbus, an extruder controller, a fieldbus communication module of an extruder, a controller of a microwave curing machine, a fieldbus communication module of the microwave curing machine, an oven controller, a fieldbus communication module of the oven, a tractor controller, a fieldbus communication module of the tractor, a punching machine controller, a fieldbus communication module of the punching machine, a cutter controller and a fieldbus communication module of the cutter; the master station controller carries out real-time monitoring, setting and synchronous adjustment to the technique parameters of all the equipment; the control method takes the master station controller as a core and carries out real-time monitoring and synchronous adjustment to the technique parameters of all the equipment such as the extruder, the microwave curing machine, the oven, the tractor, the punching machine, the cutter and other equipment. The fieldbus control device and the control method of the invention improve the production efficiency of the extrusion line of the rubber sealing strip.