In this paper, a novel approach to design a Process Design Kit Digital for CMOS 180nm process is presented. This work proposes a detailed flow to design a PDK Digital using Ocean language, which is a vital element in the semi-custom design and applied in education purposes in universities in Vietnam. The PDK digital includes Standard Cell Library containing 47 standard cells and Wire-Load Model. The library is designed based on the CMOS 180nm process with a supply voltage of 1.8V.