The invention discloses an ejection-type heat pump waste system recycling heating mode and system based on complete thermoelectricity decoupling, and belongs to the technical field of thermoelectricity combined production and centralized heating. A multistage ejection-type decoupling device is arranged aiming at related thermoelectricity problems of thermal power plants, a high-pressure driving steam inlet of a gas distribution ejector is connected with a new steam pipe, a low-pressure steam inlet is connected with a high-pressure cylinder exhaust re-cooling pipe, a medium-pressure exhaust steam outlet is connected with a boiler reheater inlet, and a re-heating pipe is provided with an external supply steam extraction opening; a steam supply ejector adopts high-pressure re-heated steam forejecting medium-pressure cylinder exhaust steam to obtain intermediate-stage pressure; an injection-type heat pump adopts high-pressure steam for recycling waste heat of low-pressure cylinder waste steam for heating. According to the control principle, the outer supply steam extraction flow of the re-heating pipe is equal to the sum of the driving steam amount plus/minus the warm water amount ofthe gas distribution ejector; high-pressure cylinder gas inlet amount and the low-pressure cylinder gas inlet amount are close to equal-proportion change; the steam supply ejector and the ejection-type heat pump are both adjusted according to the thermal-side demands; the optimum ejection ratio of the ejector is adjusted on this basis, and then complete thermoelectricity decoupling with stepless adjustment is achieved.