The invention discloses a novel magnetic induction inclinometer based on a Hall element and a measuring method. For overcoming the defects that a traditional resistance type inclinometer is small in measuring range, low in measuring precision, poor in durability and the like, the novel magnetic induction inclinometer adopts the Hall element for serving as an inclination angle sensing element, through measuring of the Hall voltage change of the Hall element, the change rule of the rotating angle of the inclinometer can be accurately reflected, and through calculation, evolutionary characteristics of slip mass displacement can be obtained. Through the technology, the characteristic point with the large deforming or the test point nearby the sliding face is subjected to later-period deformingcontinuous observing, and the side slope sliding deforming is subjected to early warning. Compared with the prior art, the novel magnetic induction inclinometer has the important significance in improving observing precision and range and accurately reflecting the sliding mass displacement change characteristic, and the safety guarantee can be provided for the side slope engineering better.