The invention belongs to the technical field of energy and power and relates to a control method for an electromobile combined power source shaped like a Chinese character ''tian''. An electronic control unit reads electrical charge states of a first energy storing device and a second energy storing device in real time through a communication bus and controls a first switch and a second switch to be switched on and switched off and a power generation device to be started and stopped according to the electrical charge states of the first energy storing device and the second energy storing device. According to the control method, the process is simple, the principle is reliable, operation is convenient, and the service life is long; power source control is reasonable and efficient, energy consumption is low, and the environment-friendly effect is achieved.