The utility model provides a monospar converter electric block shield constructs equipment, includes main power source, contactor, monospar converter, monospar walking variable speed motor, monospar converter electric block remote control unit and monospar motor retardation coil, the monospar converter passes through the contactor to be connected with the main power source, and the U of this monospar converter, V, W terminal are connected with monospar walking variable speed motor, the S1 of monospar converter, S2, S3 terminal are connected with monospar converter electric block remote control unit's X1, X2, X3 terminal, wherein the corotation that is used for controlling second walking motor of X1 terminal move / stop, the reversal that the X2 terminal is used for controlling second walking motor moves / stops, the X3 terminal is the common port, V+, A1 terminal and the monospar converter electric block remote control unit's of monospar converter 1W1, 1W2 terminal all are connected with monospar motor retardation coil, the utility model discloses simple structure, the installation is swift, and is with low costs, and the operation is stable, increases work efficiency, the energy saving.