The X-ray micro pore optic with sector (MPOS) is a new type of X-ray focusing device. Compared with the traditional micro pore focusing devices, MPOS has application prospects in space X-ray detection with the advantages of high integration and lightweight. The MPOS focusing device is designed and developed based on the focusing theorem. The roughness of the inner wall of the micro pore is 0.4--0.5 nm, and the precision of array distribution is about 5.5%. The focusing performance of the device is tested with a point-to-point X-ray test platform. The results show that the focal spot shape is a clear hexagonal star, and the angular resolution is 7.7'@1 keV with operating voltage of 5.0 kV and current of 0.1 mA.