The cosmic high-energy neutrinos may be produced by the interaction between super-massive black hole and the matter accreted. These neutrinos only participate in weak interactions

and it's trajectories directly point to the characteristics of origin

making them a new window for observing the distant objects of the universe[1]. The traditional neutrino detection method limits the e?ective area and observation time of the probe due to its high cost and complicated technology. The Giant Radio Array for Neutrino Detection(GRAND)

which is jointly built by many countries

has the characteristics of low cost

easy deployment and large-area observation

and has become the best choice at present. Finding the origin of ultra-high-energy cosmic rays by detecting high-energy neutrinos.Currently in the location of the GRANDProto300

we used the GRANDProto35 prototype antenna in the Inner Mongolia

Balikun and other places for on-the-spot detection.The detection results show that the Balikun area has a good electromagnetic environment and is more suitable for the construction of the project. Site selection work provides the basis for the location of GRANDProto300 and the construction of other radio detection arrays.