Earth and abutment construction device for highway engineering and use method

The invention discloses an abutment construction device for highway engineering and a using method. The abutment construction device comprises a support, a crawler belt is arranged at the bottom of the support, a cab is installed at the top of the support, a smoke exhaust pipe is installed on the support, harmful tail gas is exhausted through the smoke exhaust pipe, and the abutment construction device further comprises a tail gas purification assembly. The tail gas purification assembly comprises a three-way catalyst, a supporting seat, a mounting frame, a movable seat, an inserting block, a threaded groove, an inserting groove, a threaded rod and a guide block, the three-way catalyst is mounted at the end of the smoke exhaust pipe, the mounting frame is fixed to the top of the support, and the supporting seat is mounted at the top of the mounting frame; the device has the beneficial effects that harmful tail gas exhausted by the smoke exhaust pipe is purified through the three-way catalyst, and the purifica