The invention relates to a GW6B type disconnecting switch open-type transmission case which mainly comprises an open-type case body, rotary shafts, conducting clips, a tension spring, an upper conducting pipe and a lower conducting pipe, wherein the open-type case body is mainly composed of conducting bars and a wiring board, the number of the rotary shafts is two, the two rotary shafts are arranged in parallel between the two conducting bars, the two conducting clips rotate in the reversed direction through a transmission mechanism, a voltage-sharing ball is arranged at the upper end of the upper conducting pipe, the lower conducting pipe is installed in the conducting clips, the upper conducting pipe and the lower conducting pipe are connected through a connecting pipe, the two ends of the rotary shafts are connected with the conducting bars through bearings A respectively, bearings B are arranged between the conducting clips and the rotary shafts, annular grooves are formed in the two ends of a shaft sleeve respectively, the shaft sleeve is limited and fixed through cover plates, the tension spring is obliquely arranged between the two conducting bars, and a tension spring protection sleeve is arranged on the outer surface of the tension spring in a sleeved mode. The GW6B type disconnecting switch open-type transmission case has the advantages that due to the fact that the disconnecting switch transmission case is open, working staff can observe, maintain and debug transmission pieces inside conveniently.