The utility model discloses a general-purpose tester of an ultrashort wave water regimen telemetry system, which mainly comprises a device body, a radio station, a central demodulation board, a control board, a feed-through type power meter, a power charge control module, a voltage meter, a current meter, a lithium battery and a peripheral component, wherein the voltage meter and the current meter arranged in the device body form a test instrument unit; a test interface adopts a four-pin aviation joint and performs control connection through three switches; and the feed-through type power meter is connected with an observation station antenna through interfaces ANT and TX and forms a power test unit. The general-purpose tester disclosed by the utility model has the characteristics of reasonable structural arrangement, convenience and reliability in use, high-degree integration, relatively complete functions and the like.