Increasing the grating length is the best way to realize super-narrow bandwidth filter with low insertion loss and high sidelobes suppression, but the phase error induced in the fabrication process of long grating deteriorates the performance of grating filter to a large extend. Sampled fiber Bragg grating (FBG) have the advantages of flexible wavelength design, low manufacture precision and easily realizable apodization. The scheme of super-narrow bandwidth filter based on sampled FBG is taken emphasis on, and the influence of three kinds phase error on the filter performance of -1st ghost grating is analyzed, which provides reliable guide for future long grating fabrication. The phase error of a fabricated sampled FBG with length of 6.6 cm is compensated using reconstruction equivalent chirp (REC), and a super-narrow filter with symmetric reflection and transmission spectrum, insertion loss of 1.25 dB, sidelobes suppression of 21.55 dB, 3 dB bandwidth of 26 pm and 20 dB bandwidth of 70 pm is obtained.