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The basic strength parameter that is important for use in designing pavement is the modulus of subgrade reaction (k). Increase in value of modulus subgrade reactions can be obtained by soil improvement using PVD (Prefabricated Vertical Drain). The method used to obtain the modulus of subgrade reaction value is a plate load test using plates with a diameter of 304.8 mm in soil conditions without PVD and with PVD with a distance of 100 mm and 150 mm. The results obtained from the plate load test are pressure and settlement data. The plate load test results are then graphed between pressure and settlement. The modulus of the subgrade reaction is based on a pressure of 69 kN/m2 which determines a certain settlement. The most significant increase in modulus of subgrade reaction from soil conditions without PVD was found in the condition of soil with 100 mm PVD, which is 80.73%. Whereas the condition of soil with 150 mm PVD has an increase of 56.24%. Based on this, soil with PVD with a closer distance gives a more significant increase in subgrade modulus of reaction.