The invention provides a pasting machine with an accurate positioning function. The pasting machine comprises a rack, a first moving arm, a mounting rack, a pasting plate, a plurality of distance sensors, a plurality of rotating wheels, a hydraulic pump, a material supply hopper, a driving unit and a control unit, wherein the rack comprises a first bracket which is arranged vertically; the first moving arm is arranged on the first bracket; the mounting rack is arranged on the first moving arm; the mounting rack is a rectangular frame; the pasting plate is mounted inside the rectangular frame of the mounting rack; the plurality of the distance sensors are uniformly arranged on an end surface, facing to a wall to be pasted, of the rectangular frame; the distance sensors are used for detecting the distance between the rectangular frame and the wall to be pasted; the plurality of the rotating wheels are arranged at the lower part of the rack; and the output end of the material supply hopper is arranged on the pasting plate. By adopting the pasting machine with the accurate positioning function, the rotating wheels are adjusted according to the distance between the pasting plate and thewall to be pasted to ensure that the pasting plate is parallel to the wall to be pasted, and the pasting quality of the pasting machine is ensured.