The invention provides a solar electronic closing lock and a power supply method of the solar electronic closing lock. According to one embodiment of the solar electronic closing lock and power supplyof the solar electronic closing lock, the solar electronic closing lock comprises an electronic closing lock body (10) and a solar charging module (20). The electronic closing lock body is provided with a rechargeable battery (11) for supplying power to the electronic closing lock body. The solar charging module (20) is arranged on the electronic closing lock body and is used for converting solarenergy into electric energy and charging the rechargeable battery. According to the solar electronic closing lock and the power supply method of the solar electronic closing lock, a solar charging mode or a fixed power supply charging mode can be adopted as needed, so that the cruising ability of equipment is further improved, and it is ensured that the locking and closing state of a cargo compartment is continuously and reliably monitored by the electronic closing lock in the logistics transportation process.