SM1100 full hydraulic crawler drilling rigs are configured with rotation-percussion rotary head or large torque rotation type rotary head as alternative, and equipped with down-the-hole hammer, which is designed for various hole forming operation. It is suitable for different soil condition, for example gravel layer, hard rock, aquifer, clay, sand flow etc. This rig is mainly used for rotation percussion drilling and normal rotation drilling in the project of bolt supporting, slope supporting, grouting stabilization, precipitation hole and underground micro piles, etc.