Connection indication circuit and power supply equipment

The utility model provides a connection indication circuit and power supply equipment, the connection indication circuit comprises an interface circuit, an isolation circuit, a signal output circuit and a signal indication circuit, a first interface and a second interface of the interface circuit are used for connecting a positive electrode and a negative electrode of a power supply; the isolation circuit is connected with the interface circuit, the input end of the signal output circuit is connected with the isolation circuit, the output end of the signal output circuit is connected with the signal indication circuit, and the signal output circuit is used for outputting a first level signal when the isolation circuit is not conducted and outputting a second level signal when the isolation circuit is conducted; the signal indication circuit is used for outputting a positive connection indication signal when the first level signal is received, the first interface is connected with the positive electrode of the