The invention relates to a coal mine underground remote control triangle protective shield, which mainly comprises a base, a pushing seat, a hydraulic control mechanism, a front connecting rod, a rear connecting rod, a protective beam, a top beam, a tail beam, side turning beams, an upright post oil cylinder, a connecting shaft, a side turning oil cylinder, a tail beam oil cylinder, a shield adjusting oil cylinder, an anti-falling oil cylinder, a remote control receiving controller and a transmitter. The coal mine underground remote control triangle protective shield remotely controls the oil cylinders to operate so as to complete various functions by taking hydraulic pressure as power. The upright post oil cylinder does the motion of upward supporting inclination. The top beam, the tail beam, a primary side turning beam and a secondary side turning beam are unfolded to form a similar triangle. The coal mine underground remote control triangle protective shield can support a roadway at the end, on the tail part, at the corner and on the edge of the coal mine underground roadway, has an advanced and reasonable design and a compact structure. The top beam can be lifted, unfolded and retracted. The coal mine underground remote control triangle protective shield is suitable for various roadway environments, is accurate and rapid to remotely operate and is safe, stable and reliable.