Pressure gauge with adjustable alarming device

The utility model relates to a pressure gauge with an adjustable alarming device. The pressure gauge comprises a gauge plate (1), an outer transparent cover (2), a reading pointer (3) and a connector (4), wherein the outer transparent cover (2) is arranged at the outer part of the gauge plate (1) in a sleeving manner; the reading pointer (3) is connected with a pressure measuring mechanism; and the connector (4) is connected with the pressure measuring mechanism. The pressure gauge with the adjustable alarming device further comprises a green lower limit pointer (5), a red upper limit pointer (6) and a shaft sleeve; a fixing supporting column is arranged at the bottom part of the sleeve shaft and is fixedly connected to a central position in the gauge plate (1); the lower limit pointer (5) and the upper limit pointer (6) are respectively fixed to the middle part of the shaft sleeve; the upper part of the shaft sleeve is fixed to the center of the outer transparent cover (2) through a cap; and a groove shaped