An electrically controlled locking apparatus, comprising: a safety housing provided with at least one cover; a rotating shaft provided in the housing, the rotating shaft being fixedly connected to a component to be locked and being configured to drive the component to be locked outside the housing to rotate; a locking sheet fixedly provided on the rotating shaft, the locking sheet being perpendicular to the rotating shaft and being provided with a pin control portion; a locking pin being configured to selectively engage with the pin control portion and being driven to rotate via a power motor; and a control portion being configured to control a rotation of the power motor according to a control instruction, such that the locking pin is controlled to be engaged with the pin control portion to lock the locking sheet and the component to be locked, or to be disengaged from the pin control portion to unlock the locking sheet and the component being locked; wherein an opening/closing state monitoring device is provided between the cover and the housing; the opening/closing state monitoring device comprises a supporting plate and a self-returning pressing sheet mounted on a surface, facing the cover, of the supporting plate; and the self-returning pressing sheet is rotatably provided on the supporting plate via a rotating shaft, and comprises one end extending towards the cover and forming a pressing end and the other end forming a detecting end; the rotating shaft is located between the pressing end and the detecting end; and a detecting sensor is provided in a stroke of the detecting end rotating around the rotating shaft. a safety housing provided with at least one cover; a rotating shaft provided in the housing, the rotating shaft being fixedly connected to a component to be locked and being configured to drive the component to be locked outside the housing to rotate; a locking sheet fixedly provided on the rotating shaft, the locking sheet being perpendicular to the rotating shaft and being provided with a pin control portion; a locking pin being configured to selectively engage with the pin control portion and being driven to rotate via a power motor; and a control portion being configured to control a rotation of the power motor according to a control instruction, such that the locking pin is controlled to be engaged with the pin control portion to lock the locking sheet and the component to be locked, or to be disengaged from the pin control portion to unlock the locking sheet and the component being locked; wherein an opening/closing state monitoring device is provided between the cover and the housing; the opening/closing state monitoring device comprises a supporting plate and a self-returning pressing sheet mounted on a surface, facing the cover, of the supporting plate; and the self-returning pressing sheet is rotatably provided on the supporting plate via a rotating shaft, and comprises one end extending towards the cover and forming a pressing end and the other end forming a detecting end; the rotating shaft is located between the pressing end and the detecting end; and a detecting sensor is provided in a stroke of the detecting end rotating around the rotating shaft.