The invention provides a long-endurance unmanned aerial vehicle adopting new energy. The long-endurance unmanned aerial vehicle comprises a vehicle body, a flexible solar cell, motors, a control module, a communication module, a power module, propellers and a separation board and further comprises a hydrogen cell and hydrogen balloons. The flexible solar cell is arranged on the hydrogen balloons. The separation board is arranged below the hydrogen balloons. The vehicle body is suspended below the separation board. The control module, the communication module, the power module and the hydrogen cell are arranged in the vehicle body. The motors and the propellers are arranged on the vehicle body. By the adoption of the long-endurance unmanned aerial vehicle adopting the new energy, the new energy is used, and the flight time of the unmanned aerial vehicle is prolonged. Zigbee and other self-networking communication modules are loaded, an unmanned aerial vehicle cluster in a team is released, and a forest region or farmland on a large scale is monitored. The long-endurance unmanned aerial vehicle has an important significance in the early warning aspect and the civil aspect.