Taking Zhengzhou UHVDC converter station as the research object, two new ice-melting connection schemes were suggested for the indoor DC field of converter station, whose economic and technical features were also compared, based on the principle of outdoor emergency ice-melting connection and the particularity of indoor DC field. According to the recommended electrical connection form, the corresponding new electrical layout scheme of indoor DC field was proposed. Finally, the operation mode of emergency ice-melting and its superiority were analyzed. The research results can be references for the design of UHVDC indoor field in UHVDC converter stations.