Both normal pulsars and millisecond pulsars show timing noises.The variations of rotation are the main reason of timing noises in pulsars.Combining the timing data from the Nanshan 25 m radio telescope and Parkes 64 m radio telescope, we analyze the rotations of PSR J1539-5626, J1832-0827, and J1847-0402 using the pulsar timing method. Strong timing noises dominate the timing residuals of the three pulsars.The slope for the power spectrum of timing noise is -6, -6, and -4.5, respectively, and the intensity of the power spectrum is 1.77 x 10^-17 yr³, 4.43 x 10^-18yr³and 2.09 x 10^-18 yr³, respectively. These pulsars show fuctuations of spin-down rates,and relative amplitude of the variations in the first derivative of the rotation frequencyare 0.75(5)%，0.035(9)%，and 0.076(2)%， respectively (the number in brackets repre-sents the effective error of the last digit). With the data from the Parkes 64 m radio telescope, we estimate the width (full width at half maximum, FWHM) of integrated pulse profiles. These pulsars show obvious variations of pulse profiles, the variation of pulse width is respectively 0.0028(6), 0.00059(3), and 0.00011(4) phase. We calculate the correlation coefficient between the rotational parameters and FWHM. It is found that there is no obvious strong association between the spin-down rate and FWHM.