The invention discloses a forcing type elevator with a lower-mounted mainframe. The forcing type elevator comprises a derrick, a plurality of guide rails arranged on the derrick and a car in sliding fit with the guide rails, wherein a traction machine is arranged at the bottom of the derrick, a traction wheel driven by the traction machine is arranged on the derrick, at least one lifting cable wound around the traction wheel and connected with the car is arranged on the traction wheel, one end of the lifting cable is a connecting end, the other end of the lifting cable is a free end, the connecting end is connected with the traction wheel, and the free end is connected with the car. A buffer assembly is arranged at the bottom of the derrick and comprises a buffer frame connected with the derrick and a buffer device arranged on the buffer frame, wherein the buffer device is located below the car. The forcing type elevator has the advantages that sundries lifting and carrying can be effectively performed, a counter weight and other structures are reasonably simplified, the cost is relatively low, and the forcing type elevator has a whole protection structure and can effective ensurethe safety and whole structure integration when an accident occurs.