Press pile perpendicularity detection device

The invention relates to a pile pressing perpendicularity detection device, and belongs to the technical field of pile pressing construction in pile foundation engineering. A hinged connector is arranged at the top of the pile hammer, a hammering plane is arranged at the bottom of the pile hammer, a cavity is formed in the middle of the pile hammer, a detection round hole communicated with the hammering plane is formed in the bottom of the cavity, the axis of the detection round hole is perpendicular to the hammering plane, a hanging lump is arranged in the cavity through a hanging wire, and an infrared sensor is arranged at the bottom end of the hanging lump. An infrared sensor is arranged on the hammering plane, the infrared ray emitting direction of the infrared sensor is vertically downward, the hanging lump is located above the detection round hole, when the hammering plane is in a horizontal state, the infrared ray emitted by the infrared sensor points to the center position of the detection round hole,