The invention discloses a stalling protection device of parking equipment, comprising a supporting frame. The upper end of the supporting frame is provided with a left supporting seat and a right supporting seat; a transmission shaft is rotationally arranged between the left supporting seat and the right supporting seat; both ends of the transmission shaft are respectively fixedly sleeved with lifting chain wheels; the transmission shaft is fixedly sleeved with a large transmission chain wheel and a large auxiliary rotary drum; the supporting frame is provided with a double-output shaft motor; output shafts positioned on both ends of the double-output shaft motor are respectively fixedly sleeved with a small transmission chain wheel and a small auxiliary rotary drum, wherein the small transmission chain wheel is in matched transmission with the large transmission chain wheel, and the small auxiliary rotary drum is in the matched transmission with the large auxiliary rotary drum; a transmission chain capable of being circularly transmitted is sleeved between the small transmission chain wheel and the large transmission chain wheel; and a steel rope is sleeved between the small auxiliary rotary drum and the large auxiliary rotary drum. The invention has reasonable structure design and can not generate car carrying board falling phenomena when the double-row transmission chain issuddenly broken, thereby preventing any influence from being caused on personnel or vehicles or equipment.