Separable and recoverable secondary water rocket device with height measurement function

The utility model discloses a separable and recoverable two-stage water rocket device with a height measuring function. The separable and recoverable two-stage water rocket device comprises a first-stage rocket body and a second-stage rocket body, the first-stage rocket body comprises a first-stage power cabin and a plurality of water rocket empennages; the primary power cabin comprises an upper empty bottle and a lower empty bottle arranged at the lower part of the upper empty bottle; the bottom of the upper empty bottle is communicated with the bottom of the lower empty bottle; the second-stage rocket body comprises a second-stage power cabin, a first-stage parachute cabin, a second-stage parachute cabin and a water rocket nose cone; the two sides of the first-stage parachute bin are separately connected with the first-stage power cabin and the second-stage power cabin. The first-stage parachute cabin comprises a first-stage parachute and a second-stage separator; one end of the second-stage separator is co