Abstract: Taking the hydraulic pump station of a blasthole construction drilling rig as the research object, we design principle for drilling rig pump station, the design and calculation method of the related components in hydraulic pump station, including motor pump set and coupling. According to the characteristics of the compact structure of the drilling rig, combined with the structure layout of the whole machine, hydraulic pump parameters and the requirements for oil cleanliness, the general assembly of oil tank is designed. According to the requirements of temperature rise of drilling rig, the cooler is calculated and selected, which provides a strong guarantee for the stable operation of the hydraulic system. Through the debugging of the drilling rig in the workshop, it shows that the designed hydraulic pump station satisfies the normal operation of the drilling rig and has high reliability.