The invention relates to the technical field of petroleum oil production, in particular to a perforation and layering oil production combined device and an oil production method. The device comprises a perforation and production combination layering production pump, a throw-in type bottom valve, a packer, a screen pipe and a perforation gun. One end of the perforation and production combination layering production pump is connected with one end of the packer. The other end of the packer is connected with one end of the screen pipe, the other end of the screen pipe is connected with the perforation gun, and the throw-in type bottom valve is arranged at the bottom of the perforation and production combination layering production pump. Because the perforation and production combination layering production pump and the perforation gun are lowered into an oil well section at the same time, an old oil layer and a new reperforation oil layer can be produced at the same time without tripping a down-hole string after perforation is completed, and then perforation and layering oil production can be completed in a one-off mode; in this way, the oil well operation technology is simplified, the producing degree of the oil layers is increased, the oil layers can be protected, the oil well yield can be increased, production time efficiency can be improved, and oil and gas resource waste can be avoided.