The invention relates to an automatic throttle pipe collector filtering device for pressure control drilling. The automatic throttle pipe collector filtering device comprises a driving device (1), a coupler (2), a taper rotation breaking mandrel (5) fixedly connected with a transmission shaft (62), a fixed shaft (61) fixedly connected with the minor diameter end of the rotation breaking mandrel, a shell (4), a spiral seal assembly (70) and a spiral seal assembly (70a), wherein an inflow opening and an outflow opening are formed in the two ends of the shell (4) respectively, the spiral seal assembly (70) and the spiral seal assembly (70a) are connected with the shell through threads, a fixed spiral driving piece (53) is fixed to the outer surface of the rotation breaking mandrel, an end cover (6) and an end cover (6a) are arranged at the two ends of the rotation breaking mandrel, one end cover is provided with inflow through holes, and the other end cover is provided with outflow through holes. A part of fluid of returned drilling fluid and fine rock cuttings enter the inflow through holes and flow out of the outflow through holes, and remaining chunk rock cuttings are rotatably pulverized by the spiral driving piece and a groove formed by the spiral driving piece and the rotation breaking mandrel and flow out of gaps between the rotation breaking mandrel and the inner wall of the shell. Flow distribution is conducted on big rock cuttings and fine rock cuttings, so that the filtering device is prevented from being blocked by big rock cuttings, pressure fluctuation is reduced, and well control safety is guaranteed.