The utility model relates to a waste gas and waste heat energy utilization and mechanical energy transmission system of a gas type natural gas compressor, belonging to the technical field of waste gas and waste heat energy utilization of the gas type natural gas compressor; the system disclosed by the utility model is composed of an organic Rankine circulation system and a power transmission system, wherein an exhaust manifold of the gas type natural gas compressor in the organic Rankine circulation system is respectively connected with an exhaust pipe I of the gas type natural gas compressor, an exhaust pipe II of the gas type natural gas compressor, an exhaust pipe III of the gas type natural gas compressor and an exhaust pipe IV of the gas type natural gas compressor in the power transmission system; and a pneumatic motor in the organic Rankine circulation system is connected with a hydraulic torque converter in the power transmission system. The system disclosed by the utility model is capable of increasing the effective output power of the gas type natural gas compressor, sufficiently recovering and utilizing waste gas and waste heat of the gas type natural gas compressor, and reducing fuel consumption and CO2 emission simultaneously, and has good dual effects for saving energy and protecting environment.