The integrity of rock from borehole of engineering investigation of the water diversion tunnel in CentralYunnan province is comprehensively ascertained and analyzed by the combination of acoustic logging and borehole imaging. The principles and the features of acoustic logging and borehole imaging are expounded. Furthermore, accurate and reliable rock integrity information is given according to the acoustic velocity jumping intensity of acoustic logging curve and the fracture characteristics (position, inclination and development intensity) of borehole imaging for borehole ZGZK2 and borehole XLZK7. The emphasis of rock integrity parameters obtained by acoustic logging differs from those by borehole imaging, in view of this, differences in the results of fracture development by the two methods are compared and analyzed, which is beneficial to improving comprehensive and accurate rock integrity assessment for a single logging method. Practices prove that the comprehensive geophysical well logging technology has good efficiency in deep rock exploration.