The invention discloses a large pump body hoisting appliance for petroleum transportation, and discloses a hoisting device adjusting a force arm to balance a pump body through an inclined angle formedbetween two suspension arms and in combination with the positions of connection hooks on the corresponding suspension arms. The hoisting device is characterized in that a reinforcing plate is arranged at one side of the main suspension arm, and the sections of the reinforcing plate and the main suspension arm are T-shaped; a reinforcing plate is arranged at one side of the auxiliary suspension arm, and the sections of the reinforcing plate and the auxiliary suspension arm are T-shaped; a connection arm is arranged at one end of the main suspension arm; a connection arm is arranged at one endof the auxiliary suspension arm; the connection arm on the main suspension arm is connected with the connection arm on the auxiliary suspension arm through a connection shaft; a support arm is arranged on the auxiliary suspension arm and bonded with the corresponding reinforcing plate; the surface bonded with the corresponding reinforcing plate, of the support arm, is composed of two inclined surfaces, and an external angle formed by the two inclined surfaces is an obtuse angle; a plurality of connection grooves are equidistantly formed in the main suspension arm; the lengths of the connectiongrooves are gradually increased from one end of the main suspension arm to the other end; and the a plurality of connection grooves are equidistantly formed in the auxiliary suspension arm.