Water rocket high-precision altimeter

The utility model provides a high-precision altimeter for a water rocket, which belongs to the technical field of measuring instruments and comprises an outer closed shell, an inner mounting frame, a plurality of elastic elements, a communication hose, a Beidou navigation module, an electronic inertial navigation module, an electronic barometer, a communication module, a data processing module and a power module. According to the utility model, corresponding data in the flight process of the water rocket can be obtained in real time, and a flight path with higher precision can be generated by using the data; water can be prevented from entering the internal electric control modules, the possibility of inertial damage of the electric control modules due to impact can be reduced through buffering of the elastic elements when impact occurs, and the integrity of the electric control modules and the connecting positions of the electric control modules can be guaranteed; and through the arrangement of the communica