The invention discloses an assembly, energy consumption andself-resetting method for a shape memory alloy spring buckling restrained brace, and belongs to the field of construction damping. In order to solve the problems that an inner core has low bracing capacity in an earthquake due to the fact thatan existing brace mainly relies on inner core deformation to consume energy, the replacing and maintaining cost of the brace is high, and the brace has no self-resetting capacity. A plurality of shape memory alloy springs are connected to the outer peripheries of round steel pipes in a coating mode, and thetwo round steel pipes and an upper steel plate are fixedly connected by vertical steel strips; and two first steel blocks are clamped at the positions, on the end portions of the two shape memory alloy springs,on the round steel pipes correspondingly, second steel blocks of cross-shaped long steel strip concave groove inner cores are clampedat the positions,between the two shape memory alloy springs, on the round steel pipes correspondingly,and a steel plate set is connected with the upper steel plate by bolts. The assembly, energy consumption andself-resetting method for the shape memory alloy spring buckling restrained braceis of an assembly type, most parts are connected by bolts, disassembly is convenient and rapid, and routine maintenance and renovation after the earthquakeare easy.