The strong coupling,nonlinear dynamical equations of the parallel type sixaxis accelerometer have brought great difficulties to decouple six acceleration components timely, stably and accurately.By introducing an auxiliary angular velocity,the Euler dynamical differential equations were transferred from secondorder nonlinear ones into firstorder linear unsteady ones.The numerical results of the carrier′s angular velocity and attitude matrix were separately acquired by use of matrix solution twice,then,the angular motion parameters were solved.The linear motion parameters can be obtained by taking angular motion parameters into Newton dynamical equations,thus,the sixaxis acceleration components was completely decoupled.The dynamical simulation test shows that in 5 s,using matrix solution to decouple dynamical equations, the maximum fiducial errors of all three linear acceleration and three angular acceleration components were less than 0.2% and 0.1%, respectively, which has fully illustrated the correctness and efficiency of the matrix solution method deprived in this paper.