The invention discloses an inspection tool of secondary electric power equipment. The inspection tool of secondary electric power equipment comprises an external inspection plate and an internal inspection plate, wherein an opening is formed in a surface of the external inspection plate; the perimeter of the opening of the external inspection plate is matched with the perimeter of an outer side edge of a standard case of the secondary electric power equipment to be inspected; the external inspection plate can sleeve the outer side of the standard case; two opposite side edges of the internal inspection plate are respectively matched with opposite guide rail grooves in the standard case and can be inserted in the corresponding guide rail grooves; the distance between the two side edges, which are inserted in the guide rail grooves, of the internal inspection plate is matched with the distance between the opposite guide rail grooves; and the external inspection plate is connected with the internal inspection plate through a connecting piece. The inspection tool is high in inspection efficiency and is suitable for inspecting the secondary electric power equipment in batches.