The invention discloses a disc brake braking and motor suspension fused driller winch brake device, and further discloses a control method of the disc brake braking and motor suspension fused drillerwinch brake device. The control method includes that the judgement that if braking is needed for a logical interlock is performed by combining current status of all equipment and actual status of technological parameters; when a PLC (programmable logic controller) judges out that a braking condition exists, a disc brake liquid-gas control valve unit performs braking action; then, the PLC detects if current feedback pressure of disc brake executing mechanism safety tongs and current feedback pressure of disc brake executing mechanism work tongs are in a normal range, and when the current feedback pressure of the disc brake executing mechanism safety tongs and the current feedback pressure of the disc brake executing mechanism work tongs are both in the normal range, the status that a disc brake is thrown into normal work can be confirmed, an a main motor stops running, and if not, the main motor continue to keep a suspension state under starting status, and the PLC controller sends a disc brake abnormity warning signal to a driller operation display screen. The disc brake braking and motor suspension fused driller winch brake device and the control method thereof overcome the disadvantage that the main motor cannot automatically implement emergency start for holding a drill stem in suspension mode under fault status of the disc brake, and greatly improve operation safety of a driller.