The invention relates to a magnetoelectric rotating speed sensor suitable for large-spacing measurement. The magnetoelectric rotating speed sensor comprises an armature framework, an enameled wire coil, a shell, an insulating sleeve, an insulating spacer, a lead, a connector and a shaft end bolt embedded with a permanent magnet, wherein the armature framework, the enameled wire coil, the insulating sleeve and the insulating gasket are assembled into an assembly, the assembly is installed inside the shell, the enameled wire coil and the connector are connected through a lead, and after connection is completed, potting is performed and the connector is fixed to the shell to form a magneto-electric rotating speed sensor sensitive assembly, the shaft end bolt is installed on a rotating shaft to be measured, periodic magnetic field changes are formed through the permanent magnet, and the assembly is installed in the magnetic field change range, so that the enameled wire coil generates sinusoidal alternating current signals, and then the alternating current is periodically converted into revolutions. The magnetoelectric rotating speed sensor has the advantages that large-spacing non-contact measurement between the sensor and the rotating shaft can be realized, the output amplitude is large, and the vibration resistance is strong.