The invention discloses a safety protection device of outdoor electric detecting equipment, and belongs to the technical field of electric facilities. The safety protection device of the outdoor electric detecting equipment comprises a main storage box, auxiliary storage boxes and a buffer module; and the buffer module comprises multiple buffer springs and multiple speed adjusters. Under the condition of the same initial speeds of the auxiliary storage boxes, the speed adjuster enables an acceleration of a first inner bottom surface approaching a first outer bottom surface to be higher than anacceleration of the first inner bottom surface leaving from the first outer bottom surface or enables an acceleration of a second inner bottom surface approaching a second outer bottom surface to behigher than an acceleration of the second inner bottom surface leaving from the second outer bottom surface. The safety protection device of the outdoor electric detecting equipment can reduce the impact force in returning of the auxiliary storage bodies, effectively reduces the reciprocating motion times of the auxiliary storage boxes, reduces the impact times of the auxiliary storage boxes, effectively protects the outdoor electric detecting equipment, and prolongs the service life of the outdoor electric detecting equipment.