A high-precision and small-blind magnetostrictive displacement sensor with a magnetoelectric coupling sensor configuration was proposed for the displacement measurement scenarios where the installation space is limited, such as in electro-hydraulic power system, hydraulic cylinder and precision machinery, and where measurement accuracy is required. The signal detection element of the sensor adopts Co70Fe30 / PZT-5/ Co70Fe30 magnetoelectric composite as the core sensitive material, which operates in a longitudinal magnetizationtransverse polarization operating mode. An adjustable experimental platform was set up for pulse current and axial bias magnetic field, using a 0. 5 mm diameter Fe46. 5Ni 48. 5Cr2Ti 2. 5Al 0. 5 waveguide to verify the accuracy of the model. The optimal excitation pulse current range of the sensor is 15~30 A and the optimal bias magnetic field range is 15~25 kA/ m. Using Fe-Ni as waveguide wire material and Co70Fe30 / PZT-5/ Co70Fe30 magnetoelectric composite material, a prototype magnetoelectric coupling magnetostrictive displacement sensor was designed, and the measurement and calibration platform of the displacement sensor was built. The measurement accuracy of the prototype was ± 0. 02 mm, and the distance of a small blind area was 15 mm. Compared with the traditional coil-sensing magnetostrictive displacement sensor with the same parameters, the precision is increased by 33% , and the blind zone distance is reduced by 85% .