The invention discloses a double-hole operating device of a C-type switch, which comprises a spring mechanism, an interlocking support frame, a mechanism main shaft, a first mechanism interlocking plate, a second mechanism interlocking plate, a third mechanism interlocking plate, an opening and closing indicator, a first gear, a first half gear, a second half gear, a first interlocking sleeve, a second interlocking sleeve, an earthed interlocking frame, an earthed interlocking bar, an earthed operating rod, an earthed operating sleeve and the like. The double-hole operating device of a C-type switch realizes the interlocking of a main operating hole and an earthed operating hole, i.e. when in operating one hole, the other hole is locked and can not be operated by gear engagement. The double-hole operating device of a C-type switch has better interlocking function, thereby greatly reducing the risk caused by misoperation, and ensuring the personal safety of users well.