The invention discloses a water resource protection device. The water resource protection device comprises a base body, wherein a cavity D is arranged in the base body, a cavity C and a cavity B are arranged in the left end wall of the cavity D, a spring ring cavity B is arranged in the lower end wall of the cavity C, a sliding block B extending into the cavity C and connected with the upper end wall of the cavity C is arranged in the spring ring cavity B in a sliding manner, a spring ring is connected between the lower end wall of the sliding block B and the lower end wall of the spring ringcavity B, a spring ring cavity A is arranged in the lower end wall of the cavity B, and a sliding block A extending into the cavity B and connected with the upper end wall of the cavity B is arrangedin the spring ring cavity A in a sliding manner. The device provided by the invention is simple in structure and convenient to use, with the device, the process that glaciers melt into water which serves as a water source is efficiently realized, the phenomenon that excessive sandy soil and weed are mixed during the natural melting process is prevented, and finally, the quality of the water sourceis improved.