A microcomputer-controlled electrohydraulic servo rock triaxial dynamic shear-seepage coupling multifunctional test apparatus belongs to the technical field of rock mechanics and engineering and is characterized by comprising a loading system, a sealing system, a multiphase fluid injection system, an acoustic emission monitoring system, a transformation monitoring system and a data acquisition system. The apparatus of the invention has the advantages that the technical problem can be solved that an existing triaxial pressure chamber is unsuitable for performing rock large-displacement shear-seepage coupling under high confining pressure and high osmotic pressure; various extended functions based on the shear-seepage coupling technique can be achieved; servo controlled loading of shear-directional force, displacement and strain rate can be achieved, multiphase fluid injection and seepage during dynamic shearing can also be achieved; in addition, a temperature control system is also provided and is suitable for constant temperature control from 0 DEG C to 200 DEG C for the triaxial pressure chamber, so that a series of extended tests such as rock dynamic shear-seepage coupling characteristic test under temperature action can be carried out.