The utility model relates to a high -speed linear electric motor active cell positioning system based on gray code. Its signal response part is including shell, base, the base arrange in the shell and with shell fixed connection, shell, base extend along the active cell direction of motion, be fixed with receiving coil, transmitting coil with range upon range of mode on the base, be equipped with the insulation cover plate who protects protective ring on the shell, be fixed with the magnetizer on the active cell, the magnetizer openly corresponds with receiving coil and transmitting coil to with the insulation cover plate contactless, magnetizer corresponding the produced different voltages in position and correspond the position code between through the receiving coil with different shapes, form absolute address and accurate address, control section's core is the singlechip. The utility model discloses install electromagnetic field transmit section branch and receiving part an organic whole on fixed position, motion part (active cell) only installs the magnetizer, the non -transformer, and the positioning system precision is moderate, and the interference killing feature is strong, the adaptation adverse circumstances, the installation is simple, and the reliability is high.