The invention relates to a parameter calibration method and a parameter calibration device. The method comprises the following steps: acquiring an acceleration component of a gravity acceleration on each coordinate axis of a triaxial acceleration sensor, wherein the acceleration components are gravity acceleration components collected by the triaxial acceleration transducer under a static condition; calculating a deflection angle of a detection axis of the triaxial acceleration transducer relative to a detection axis in a running coordinate system of an object according to the gravity acceleration components; and calibrating motion parameters, which are collected by a target sensor, on a detection axis of the target sensor according to the deflection angle, wherein the target sensor is arranged on the object, and comprises the triaxial acceleration sensor and/or other sensors with detection axes parallel to that of the triaxial acceleration sensor. After the parameter calibration method and the parameter calibration device are applied, the target sensor is not required to be horizontally arranged, so that installation time is saved, the installation efficiency is improved, and the defect of inaccurate measured data caused by horizontal deviation of installation is avoided.