The invention provides a short paper cup collecting device which is used for collecting short paper cups. The short paper cup collecting device comprises a cup feeding channel, a transition lifting mechanism and a paper cup collecting mechanism. The transition lifting mechanism comprises a transition cup cage communicating with the cup feeding channel, a cup jacking structure arranged in the cup feeding channel in a penetrating mode and positioned below a receding hole, and at least two cup supporting pieces circumferentially arranged on the transition cup cage. The paper cup collecting mechanism comprises a rotating frame, at least two cup collecting cages arranged on the rotating frame and corresponding to the transition cup cage, a cup clamping structure arranged on the cup collecting cages, and a lifting structure arranged on the cup collecting cages and driving the cup clamping structure to move along the cup collecting cages. According to the short paper cup collecting device, the guiding performance of paper cup stacking is better, the paper cups are not prone to getting stuck in a multi-section conveying mode, the automation degree of the whole device is high, and collecting and discharging operation can be conducted at the same time.