The utility model provides an angle of declination display device, include scale, clamping, stop gear, canceling release mechanical system by setting gradually after going to to and both ends connect respectively scale and canceling release mechanical system just with the pull wire of stop gear fastening connection, the current angle of declination angle of outwardly directed demonstration when the scale can receive outside tensile force to inside withdrawal under the canceling release mechanical system effect, the clamping be fixed in on the outside screw rod with rectilinear movement under the effect of screw rod and to ging forward of stop gear remove carry on spacing, stop gear can along with the scale stretch out the antedisplacement and by the clamping block at the clamping rear side to its during by the clamping block maximum value of the demonstration that the scale exposes be current angle of declination angle, canceling release mechanical system is used for externally weakening or ordering about the scale when disappearing and return to contract and reset the pulling force of scale. Realize not using from this hide the scale inside the antenna during display device, can avoid the scale to expose and damage and influence the condition of internal connection structure because of strikeed by external force.