Objectives: Pavement milling process produces high concentrations of dust and free crystalline silica during. This study aimed to explore the exposure of total dust, respirable dust and respirable free crystalline silica for workers during the pavement milling operation. Methods: Ten roads were selected as the sampling sites. Both milling-site samples and personal samples were collected and analyzed according to methods CLA4002, CLA4001, and CLA 4003 recommended by the Ministry of Labor, the Executive Yuan. Results: During the pavement milling process on the 10 roads, the average total dust concentrations in samples collected by cutter confirmers, drivers, and manhole confirmers were 2.77±1.71 mg/m^3, 3.74±2.54 mg/m^3, and 0.76±0.59 mg/m^3, respectively. The corresponding average exposed respirable dust concentrations were 1.20±0.80 mg/m^3, 1.60±0.93 mg/m^3, and 0.33±0.25 mg/m^3, respectively. The respirable crystalline free silica exposure concentrations of cutter confirmers and drivers were 0.53±0.29 mg/m^3 and 0.73±0.44 mg/ m^3, respectively. Due to the short exposure time, only one sample of respirable free crystalline silica was collected for the manhole confirmer, with a concentration of 0.10 mg/m^3. The results also showed that these three kinds of dust concentrations of personal exposure were significantly higher than the background concentrations. The cutter confirmer and the driver with exposure of respiratory dust exceeding the Taiwan's permissible exposure limit accounted for 75% and 90%, respectively, or exceeding the US NIOSH recommended value of 0.05 mg/m^3 accounted for 89% and 100%, respectively. Conclusions: Workers are exposed to the hazardous respirable free crystalline silica during the process of milling roads. Personal protective equipment and dust protection devices should be strengthened to ensure the health of workers.