Multilayer water level observation device for hydrogeology

The utility model relates to the technical field of water level detection, in particular to a multi-layer water level observation device for hydrogeology, which comprises a base for supporting, and a spool is arranged above the base; the measuring line is wound on the bobbin, scales are arranged on the measuring line, the measuring line is wound and unwound by rotating the bobbin, and a conducting wire for transmitting signals is arranged in the measuring line; the detection head is arranged at the bottom of the measuring line and can transmit a water level signal to the wire; the limiting mechanism is sleeved on the measuring line; and the protective cover is arranged on the side wall of the detection head and sleeves the measuring line. When the detection head is lowered, if the measuring line swings, the rotating wheel firstly collides with the side wall of the drill hole, and the detection head is prevented from swinging too much to collide with the inner wall of the drill hole; as the position of the lan