The invention discloses a local wall stress relief method instrument indoor experimental platform and a measuring method by the same. The local wall stress relief method instrument indoor experimentalplatform comprises a base and a frame perpendicularly fixed to the base, wherein a first balancing cushion block is fixed to the inner top wall of the frame, a jack is fixed to the inner bottom wallof the frame, a second balancing cushion block is fixed to the upper end of the jack, a to-be-measured rock mass is firmly clamped by the first balancing cushion block and the second balancing cushionblock, a sleeve arranged in a vertical mode is detachably fixed to the side wall of the frame, through holes are formed in the side wall of the sleeve, the through holes correspond to the position ofthe to-be-measured rock mass, and crustal stress robot equipment is arranged in the sleeve. The equipment and the method can ensure that the crustal stress measuring work of a measuring point can becompleted in a relatively small range of the rock mass, the influences of anisotropy elements of the properties of the rock mass to the measuring result are avoided, and the reliability of a test result is improved.