The invention relates to a protection and control method for pre-charge resistor of a power battery, and is applied and loaded to a basic high voltage loop. The method comprises the following steps that in the step of pre-charge starting, a high voltage negative electrode relay and a high voltage pre-charge relay are switched off; in the step of external short-circuiting detection, after pre-charging is conducted by first calibration time, whether or not pre-charge parameters reach a first calibration threshold value is detected, if not, the step of external short-circuiting detection is executed again, and if yes, pre-charge continues; in the step of pre-charge, pre-charge is conducted on external electric elements. According to the protection and control method for pre-charge resistor ofthe power battery, by setting the step of external short-circuiting detection, when a battery pack is supplied with high voltage, it can be prevented that pre-charge resistor is impacted by externalshort-circuiting, and accordingly it can be effectively prevented that the pre-charge resistor is damaged.