The invention discloses a deep pit type helipad lifting machine. The deep pit type helipad lifting machine comprises a well, a lifting machine body and a cover plate, the lifting machine body comprises a lift car, a guide rail part and a driving part, the guide rail part comprises two symmetrically-arranged one-side guide rail assemblies, and each one-side guide rail assembly comprises a guide rail support fixed into the well, an auxiliary guide rail fixed to the guide rail support and a main guide rail; and the lift car is in sliding connection with the main guide rails through guide shoes, arope sheave support is in sliding connection with the auxiliary guide rails through guide shoes, one end of a steel wire rope is fixedly connected to the bottom of a cylinder block of an oil cylinder, the other end of the steel wire rope is fixedly connected to a load bearing beam, and the oil cylinder is located below the rope sheave support. According to the deep pit type helipad lifting machine, a building higher than a roof does not need to be arranged, a top layer is in landing-door-free design, in the non-working state, the lifting machine body is stopped in a well of a building; and inthe rising state, when the machine rises to the topmost layer, a cover plate is jacked up through the lifting machine body, lift car flat layer backward door opening is carried out, and person and equipment conveying from a helipad to the building is achieved.