Driller blocking-proof hydraulic equipment

The utility model discloses a drill anti-sticking hydraulic device which can automatically control advance speed of a cylinder and has anti-sticking function. The utility model comprises an oil tank, a variable displacement pump, a power source, an intake filter, an oil return filter, a control valve group, a stretching oil tank, an impact mechanism and a rotary motor, wherein, the control valve group consists of an overflow valve, a left directional control valve, a middle directional control valve and a right directional valve, an anti-sticking valve group is arranged between the stretching oil tank and the control valve group, and the anti-sticking valve group consists of a directional control valve, two one-way valves and an overflow valve. The drill anti-sticking hydraulic device can avoid drill-sticking and ensures normal work of the drill. The utility model is fit for soil-rock mixture rapid hole-formation drill, etc.