The invention discloses an output system for a ceramic substrate sintering production line. The output system comprises a feeding device, a vacuum adsorption conveying device, a receiving trolley, a cooling device and a control device; the feeding device is located at the start end of the vacuum adsorption conveying device and is used for feeding a ceramic substrate into the vacuum adsorption conveying device; the receiving trolley is located at the tail end of the vacuum adsorption conveying device; the cooling device is located right below the vacuum adsorption conveying device; and the control device is electrically connected to the feeding device and the vacuum adsorption conveying device. According to the output system for the ceramic substrate sintering production line, the sintered ceramic substrate is output through the vacuum adsorption conveying device, a telescopic sucker is arranged on a belt of the vacuum adsorption conveying device, when the ceramic substrate needs to be adsorbed, the telescopic sucker extends out and provides adsorption force, when the ceramic substrate enters the receiving trolley area, the telescopic sucker retracts and releases the ceramic substrate, and therefore the ceramic substrate can automatically fall; and the receiving trolley can be automatically lifted in the receiving process so that the fall height of the ceramic substrate can be shortened as much as possible, and damage to the ceramic substrate can be avoided.