An early fault removal test device for linear displacement sensors belongs to the technical field of fault detection, and is provided to solve the problem that early fault check cannot be carried out on linear displacement sensors in the prior art. The early fault removal test device comprises a fault excitation device, a common-environment installation platform, and a driving and stroke adjusting device. In the fault excitation device, a temperature and humidity test box is divided by a partition into an upper layer and a lower layer; a vibration table is disposed in the lower layer of the temperature and humidity test box, and the upper end face thereof extends to the upper layer; and a variable-frequency controller is fixed on the upper end face of the temperature and humidity test box. The common-environment installation platform is disposed on the upper layer of the temperature and humidity test box and fixed on the upper end face of the vibration table. The common-environment installation platform comprises 2n common-environment sub units which are arranged in parallel and are of the same structure. Each common-environment sub unit consists of an upper slide plate and a lower slide plate which are in relative sliding fit. Two linear displacement sensors are arranged in parallel on the upper end face of each upper slide plate along the length direction of each upper slide plate. The driving and stroke adjusting device is connected with the upper slide plates of the common-environment installation platform, and drives the upper slide plates to do reciprocating motion. The number of times of reciprocating motion and the motion distance are measured through a motion detection mechanism.