Preheating system and method of walking power station and walking power station

The invention discloses a preheating system and method of a walking power station and the walking power station, and belongs to the technical field of engineering mechanical equipment. The preheating system comprises an engine, an engine water tank, a fuel heater, a distribution valve, a fuel tank and a plurality of heating execution devices, wherein the engine is connected with the engine water tank; a second water outlet of the engine is connected with a water inlet of the fuel heater through a first ball valve; a water outlet of the fuel heater is connected with a first cavity of the distribution valve, and the first cavity is connected with the heating execution devices; a water outlet of each heating execution device is connected with the second cavity, and a water outlet of the second cavity of the distribution valve is connected with a first water return hole through a second ball valve; and an oil outlet of the fuel tank is connected with an oil suction hole of the fuel heater and an oil inlet of the