The study of application of portable fully hydraulic drill is carried out in the exploration of Maoniuping rare earth mining area， and the performance and advantages under complex geological conditions are explored. The modular design improved the environmental adaptability of the drill. Advanced drilling technologies such as thin wall series drill rods and low solid flushing fluids are adopted to form a set of drilling technical parameters suitable for the fractured strata in the mining area， and the drilling efficiency and core recovery rate are successfully improved. Based on the engineering practice， the construction situation and application effect of portable drill have been discussed， and the existing problems and the countermeasures are summarized and proposed. The research shown that portable fully hydraulic drill have demonstrated significant applicability in drilling complex strata of rare earth minerals， which provides important references for the exploration and construction for this type of mineral.