Automatic leakage blocking device with width regulating function

The invention provides an automatic leakage blocking device with a width regulating function. A leakage blocking regulating hole is formed in a leakage blocking support frame; a leakage blocking width regulating rod is connected with two fastening block connecting rods through a regulating connecting shaft; the fastening block connecting rods are connected with horizontal regulating fastening blocks through fastening block connecting shafts; a regulating hole sealing plate is connected with the leakage blocking support frame through a sealing plate regulating shaft; a leakage blocking agent sealing layer covers the outer layers of the horizontal regulating fastening blocks, and is connected with the leakage blocking support frame; and a leakage blocking agent filling groove is formed between the horizontal regulating fastening blocks and the leakage blocking agent sealing layer. The automatic leakage blocking device has the beneficial effects that the leakage blocking efficiency of the leakage blocking device is effectively improved; the use range of the leakage blocking device is effectively expanded; and the practicability of the leakage blocking device is greatly improved.