To overcome the problems of high cost

insufficient on-site test ability and high precision demand for accelerometer test location that existing triaxial accelerometer non-orthogonal error angle test method has

a new test method based on ellipsoid hypothesis is proposed for on-site use. Considering only non-orthogonal error angle factors

an error model for triaxial accelerometer is established. Experimental results show that using proposed onsite method based on ellipsoid hypothesis without auxiliary equipment can realize accelerometer non-orthogonal error compensation and the impact of non-orthogonal error angle on accelerometer can be observed visually by the degree of sphere of drawing ellipsoid.