The invention relates to the technical field of automobile lamps, more specifically to a lamp circuit capable of indicating charging capacity. The lamp circuit capable of indicating the charging capacity specifically comprises a single chip microcomputer power supply circuit module, a signal receiving and transmitting conversion circuit module, a position lamp constant current circuit module and asingle chip microcomputer detection control circuit module, wherein the single chip microcomputer power supply circuit module provides linear voltage stabilizing power supply; the signal receiving and transmitting conversion circuit module performs conversion and communication on data between an automobile body controller and the single chip microcomputer detection control circuit module; and thesingle chip microcomputer detection control circuit module is connected with the module, receives an automobile body controller signal transmitted by the signal receiving and transmitting conversioncircuit module and drives LED lamps in both the position lamp constant current circuit module and an identification lamp constant current circuit module to be turned on according to designated brightness and effects. According to the lamp circuit capable of indicating the charging capacity, a position lamp and a LOGO lamp adjust the brightness and dynamical turn-on effect of LED in real time according to a battery capacity signal to show the interval of battery capacity; a user can observe the charging capacity from the outside of the automobile without entering into an automobile to start theautomobile; and therefore, the lamp circuit capable of indicating the charging capacity is convenient, fast and visual.