A separating tool for separating out objects one by one from a stack of objects includes a support base, an assembly plate positioned on the support base, a vertical sliding assembly slidably positioned on the assembly plate, and two opposing clamping members connected to the vertical sliding assembly. Each clamping member includes an engaging plate, a connecting shaft fixed to the engaging plate, and a cam base positioned on the support base. The cam base defines a cam slot, and the connecting shaft slides in the cam slot. A distance from a top end of the cam slot to the engaging plate is less than that from a bottom end of the cam slot to the engaging plate, such that the engaging plates of the two clamping members move together when the engaging plates are moved upwards with the connecting shaft.