Underground water level observation device for hydrogeological exploration

The invention belongs to the technical field of hydrogeological exploration, and particularly relates to a hydrogeological exploration underground water level observation device which comprises a trapezoidal observation well, an observation well protection cylinder and a water level data processing host, and the top end of the observation well protection cylinder is connected with a cylinder cover through a bolt. The underground water level observation device has the capacity of accurately observing underground water levels of different depths by a single well, has the functions of resisting water flow interference and measuring the electric conductivity of underground water, can improve the convenience of underground water level observation, can also improve the accuracy of observation data of the underground water level observation device, and is suitable for popularization and application. The underground water level observation device can monitor the water quality change of underground water and facilitat