Connecting device for laying impermeable membrane

The utility model discloses a connecting device for laying an impermeable membrane, which comprises an adjusting frame, an adjusting mechanism is arranged in the adjusting frame, a connecting plate is connected to the adjusting mechanism, one end of the connecting plate is connected with a placing plate, a positioning rod is arranged on the placing plate, a limiting mechanism is arranged on the positioning rod, and the limiting mechanism is connected with the connecting plate. And a pressing plate is mounted on the positioning rod. According to the connecting device for laying the impermeable membrane, in actual use, the impermeable membrane is placed on the placing plate through the positioning rod, the pressing plate is placed on the impermeable membrane, the positioning rod penetrates through the pressing plate, the limiting spring pushes the limiting plate to move, the limiting rod on the limiting plate is pushed to stretch out, the limiting rod is connected with the groove in an inserted mode, and the im