Auxiliary lubricating device of turbocharger

The utility model discloses a turbocharger auxiliary lubricating device which comprises a turbocharger communicated with an engine oil pan through a main oil duct, an oil outlet of the turbocharger is communicated with the engine oil pan through a backflow oil duct, and an engine lubricating pump and an auxiliary lubricating pump are connected to the main oil duct in parallel. When in use, after a power supply of vehicles such as engineering machinery and the like is switched on, the pressure transmitter can monitor the pressure in the backflow oil duct and send the detected pressure value to an ECU (Electronic Control Unit) of the vehicle, and when the pressure value is smaller than a set value, the ECU starts a switch of the auxiliary lubricating pump, so that the auxiliary lubricating pump is started. The auxiliary lubricating pump is arranged in the engine oil pan, so that oil in the engine oil pan is pumped into the turbocharger through the auxiliary lubricating pump to lubricate a turbine shaft, a beari