A marble machine water supplying self-control device comprises a power source module, a control module, a water supplying module and a water storage tank and is characterized in that the power source module comprises an electric leakage protector (11) and a power source (12), the control module comprises an electric current inductive switch (21) and a relay (22), and the water supplying module comprises an immersible pump, a fixing component (31) of the immersible pump, a water supplying pipe, a connecting pipe piece (32) of the water supplying pipe, a water spray nozzle (33), a pressure relief valve (34) and a water control PWM module (35); and the water storage tank comprises a water tank upper cover (41) and a tank body (42). The marble machine water supplying self-control device has the advantages that the device structural design is reasonable, manufacturing is convenient, the intelligent degree is high, the device is suitable for marble machines of different types, the self-control water supplying device can automatically recognize the conditions of marble machine cutting starting and stopping to selectively open or close a water source, operation is easy and convenient, and flying dust on a construction site is effectively reduced.