Deep hole detection device

The utility model provides a deep hole detection device which can improve the work efficiency, promote the detection accuracy and reduce the labor intensity. The deep hole detection device comprises a supporting base, a detection mechanism, a power mechanism and a positioning sleeve, wherein the supporting base is L-shaped and comprises a base and a vertically arranged supporting rod, the detection mechanism and the power mechanism are arranged on the supporting rod, the power mechanism is located above the detection mechanism, the positioning sleeve is arranged on the base, the detection mechanism comprises a detection rod, a limiting ring and a detection bracket arranged on the supporting rod, the detection rod is provided with a depth detection groove and three guide grooves, the detection bracket is provided with a guide rail, the power mechanism comprises a power bracket and a cylinder, the power bracket is arranged on the supporting rod, the cylinder is arranged on the power bracket, and the positioning