The utility model relates to a pass box being compatible to three kinds of transformers and applied to an automatic verification system. A main box body is a rectangular box body with the upper end opened, transverse limiting grooves are symmetrically formed in the upper ends of the two longitudinal sides of the main box body, and longitudinal limiting grooves are symmetrically formed in the upper ends of the two transverse sides of the main box body. A plurality of inner liners are mounted inside the main box body in longitudinal and even distribution modes, supporting plates are symmetrically arranged on the two longitudinal sides of the upper ends of the inner liners, a plurality of separating plates are fixedly mounted on the inner liners between the supporting plates on the two sides of the upper ends of the inner liners in transverse interval and even distribution modes, arc-shaped grooves are formed in the middles of the supporting plates between every two adjacent separating plates, and grooves are coaxially formed in the upper surfaces of the inner liners between the arc-shaped grooves of the supporting plates on the two sides of the upper ends of the inner liners. According to the pass box being compatible to the three kinds of transformers and applied to the automatic verification system, after a transformer automatic verification production line runs, the pass box design is adopted, and the functional requirements of automatic feeding and discharging and automatic stacking and unstacking of pass boxes for three kinds of low-voltage current transformers (an LFZ1D type, an LMZ1D type and an LMZ2D type) are met.