Abstract: Migration abilities of conventional quartz sand and ceramsite proppant are compared. Results show that area of sand dike and suspended sand for quartz sand is both smaller than that of ceramsite, and the width generation capacity of quartz sand is weaker than that of ceramsite. Then, a typical coalbed mehane well named QS01 well located at Gaohe block of Qinshui Basin is selected as the simulation object, and physical experiments and mathematical simulations are both conducted to obtain the migration feature of ceramsite proppant and its granularity matching. Results show that under the same closure pressure, the fracture conductivity of bigger size is greater than that of smaller size; for bigger size ceramsite, the decrease rate will be reduced as closure pressure increasing, which indicates that the bigger size ceramsite has been effectively supported under bigger closure pressure. If the granularity matching of 250-380 μm, 380-1 000 μm and 830-1 400 μm is 1∶6∶2, the proppant concentration is the biggest, and the fracture conductivity is the strongest. If the granularity matching is 3∶1∶2, the proppant concentration is the smallest, and the fracture conductivity is the weakest. And if the granularity matching is 1∶1∶1, the values of proppant concentration and fracture conductivity are among the values of the two conditions above. As a result, the granularity matching should set as 1∶6∶2 during fracturing.