The invention provides a heading machine water system adopting a novel connecting mode. The system comprises a water filter, a main ball valve is mounted on a pipeline on the downstream of the water filter, and a ball valve is in lateral connection with a pipeline on the downstream of the main ball valve; a water outlet of the ball valve is connected to an inner atomization system, a pressure reducing valve is mounted on the pipeline of the downstream of the main ball valve, and a water cooler is mounted on a pipeline of the downstream of the pressure reducing valve; a built-in water cooler is connected to a pipeline of the water cooler in parallel and mounted in a heading machine oil tank, and an atomization water pump assembly is mounted on a pipeline on the downstream of the water cooler; and a reversing valve is mounted on a pipeline on the downstream of the built-in water cooler, one of outlets of the reversing valve is connected to an outer atomization system, and the other outlet of the reversing valve is connected to a tail atomization system. According to the heading machine water system adopting the novel connecting mode, the situation that very good cooling and temperature reducing effects on oil liquid of a cutting motor and a heading machine hydraulic system are achieved simultaneously can be ensured, so that the service life of all relevant components and parts is prolonged, and safe and reliable operation of all the relevant components and parts can be ensured.