The utility model discloses a bed seam leakage-proof baffle which comprises a fixing frame fixed to the side face of a bed, a telescopic plate is arranged in the fixing frame and can slide in the fixing frame, a baffle body is arranged at one end of the telescopic plate, a plurality of rotary buckles are arranged at the other end of the telescopic plate, and a spring is arranged between the bafflebody and the fixing frame. The extension length of the telescopic plate is controlled through the elastic force of the spring, so that the bed seam is shielded, when the bed moves, the spring drivesthe telescopic plate to slide in the fixing frame, automatic adjustment can be conducted according to the size of the seam, and the bed seam shielding device is simple in structure, convenient to operate and capable of preventing objects from falling off from the bed seam.