The invention provides a miniaturized portable distance measuring and calibration device. The miniaturized portable distance measuring and calibration device includes a distance measuring device and a calibration device; the distance measuring device is a roller type device and includes a core shaft, a wheel hub, a bracket, an oilless bearing, a photoelectric encoder and a shield; an infrared laser is adopted as the calibration device; the core shaft is in interference fit with the wheel hub through press fit; the oilless bearing and the bracket are in transition fit with each other and are fixed through screws; the photoelectric encoder measures the number of turns of the rotation of the core shaft; and the laser is fixed to a shell through a cover plate so as to play a role of guiding. According to the miniaturized portable distance measuring and calibration device of the invention, the devices such as the oilless bearing, the photoelectric encoder and the laser are adopted, and therefore, the size of the product can be effectively reduced, fast assembly of the product can be realized, application of the product can be facilitated, and accurate calibration and distance measuring functions can be realized.