Switching device bidirectional current detection device and method and intelligent switch

The invention discloses a switching device bidirectional current detection device and method and an intelligent switch. The device comprises a magnetic shielding assembly and a Hall detection assembly arranged in the magnetic shielding assembly. The Hall detection assembly comprises a Hall element body, a zeroing circuit, a forward acquisition branch and a reverse acquisition branch; the Hall element body is used for collecting bidirectional current and outputting forward sampling voltage and reverse sampling voltage; the zeroing circuit is used for providing zero-point adjusting voltage for the forward acquisition branch and the reverse acquisition branch; the forward acquisition branch is used for outputting a forward detection voltage according to the forward sampling voltage, the reverse sampling voltage and the zero point adjustment voltage; and the reverse acquisition branch is used for outputting a reverse detection voltage according to the forward sampling voltage, the reverse sampling voltage and the