The eastern Guangdong is situated on the southeast coast, where active faults are prevalent, posing a certain risk of moderate to strong earthquake activity. Due to the limitations of previous data, the study of one-dimensional velocity models in this area is insufficient, which has restricted the progress of seismic location and crustal structure imaging to a certain extent. The advantage of studying the internal structure of the earth using artificial seismic data lies in accurately known source time and location. Based on data from a wide-angle reflection/refraction detection project carried out by the Geophysical Prospecting Center of Eastern Guangdong in 2021, we have analyzed Pg and Pn travel time data and utilized the minimum one-dimensional velocity model method (VELEST) to construct a one-dimensional P-wave velocity model in eastern Guangdong area. The results indicate that the crustal velocity structure in this area is relatively stable, with velocities above the basement (approximately 2 km) ranging from 4.49 to 5.74 km/s. The crustal velocity structure at a depth of 12 km can be divided into upper and lower layers, with velocities around 6.6 km/s for depths between 12~30 km in the middle and lower crust. Comparison reveals that the root mean square of travel time residual calculated by our one-dimensional velocity model for eastern Guangdong is relatively small at 0.28 s, with travel time residual statistics centered on 0.0 s indicating a concentrated distribution. This suggests that our model aligns more closely with actual crustal velocity structures within our study area. This new model provides a fundamental basis and reference for seismic location and tomography within this region's research efforts.