Provided are a reaction cuvette loading device and a fully automatic chemiluminescence immunoassay apparatus. The reaction cuvette loading device comprises a transmission mechanism and a push mechanism, wherein the transmission mechanism comprises a baseplate and a first horizontal transmission mechanism provided on the baseplate; the push mechanism comprises a support assembly, a second horizontal transmission mechanism provided on the support assembly, and a push rod connected to the second horizontal transmission mechanism; and the push mechanism further comprises a direction guiding control block comprising a starting end provided at a terminal point of a cuvette pushing stroke of the push rod, a termination end provided at a starting point of the cuvette pushing stroke of the push rod, and a return track provided between the starting end and the termination end and bypassing the cuvette pushing stroke, and the separation distance between the starting end and termination end is not less than one vessel position and not more than two vessel positions.