The invention discloses an aircraft horizontal rudder surface angle measuring device, which comprises an arch block, a compass cutter suction disc, a connecting piece, a flat head rivet, a rectangular ring, a bonding belt, a plastic buckle in the shape of a Chinese character ''ri'', a cushion block, a transverse angle sensor, a vertical angle sensor and lead wires, wherein the transverse angle sensor is fixed inside the compass cutter suction disc, a fixing plate installed vertically is further arranged inside the compass cutter suction disc, the vertical angle sensor is vertically installed on the fixing plate, the connecting piece is fixed on the upper end surface of the compass cutter suction disc, one end of the rectangular ring is installed on the connecting piece through the flat head rivet, one end of the bonding belt sleeves the other end of the rectangular ring, the plastic buckle in the shape of a Chinese character ''ri'' is installed on the bonding belt, and the cushion block is installed inside the compass cutter suction disc. The aircraft horizontal rudder surface angle measuring device has the advantages of being reasonable in structural design, high in space utilization rate, convenient to use, light in weight, small in size, convenient to store, transport and use, and convenient in assembly and disassembly, effectively solving the problem of difficult installation and fixation of the sensors, and realizing angle measurement.