A 500kv electroscope safe control apparatus comprises a cart composed of a vehicle base plate, a support, a pushing handle and wheels. The vertical support is installed on the vehicle base plate. The wheels are installed on the bottom portion of the base plate. The pushing handle is installed on the side portion of the support. A hinged connection seat is arranged on the vehicle base plate. The hinged connection seat is in hinged connection with a support cylinder. The bottom portion of the support cylinder is matched with the hinged connection seat. The bottom portion of the support cylinder is sealed. The top portion of the support cylinder is an opening. A fixing plate is installed on the rear side portion of the cart. A screw nut is fixedly arranged on the fixing plate. A leading screw is arranged on the screw nut in a matched mode. One end of the leading screw is provided with a sliding sleeve. A slide bar is installed on the sliding sleeve in a matched mode. The slide bar is vertically installed on the side wall of the support cylinder. A crank is installed on the other end of the leading screw. According to the utility model, an electroscope is firmly fixed by the 500kv electroscope safe control apparatus, electricity-checking operation can be carried out once operation personnel push the cart; angle adjusting of the electroscope is accurate and convenient; the 500kv electroscope safe control apparatus is applicable to positions where electric appliance devices are densely arranged; and accidents caused by accidental touching other equipment are avoided.