The invention relates to a petroleum screening device. The petroleum screening device comprises a circular-tube-shaped screening device body, wherein a screening hole channel is formed in the screening device body; a feeding pipe and a discharging pipe, which are communicated with the screening hole channel, are arranged at two transverse ends of the screening device body; the middle part of the screening device body is rotatably connected with a rotary shaft; a plurality of filtering impellers are arranged through the rotary shaft in an annular array; in a filtering impeller array, the diameter of the filtering impeller close to one side of the feeding pipe is relatively small and the diameter of the filtering impeller close to one side of the discharging pipe is relatively great; each filtering impeller comprises a rotary table which is fixedly connected with the rotary shaft; filtering blades are arranged on the rotary tables in the annular array; each filtering blade comprises a sector-shaped outer frame and each outer frame is internally provided with a capturing net; a certain included angle is formed between the plane on which each outer frame is located and the plane on which the corresponding rotary table is located.