The invention discloses a synchronous light-electricity sensing method for a dark-field imaging-based solid nano channel. The synchronous light-electricity sensing method comprises the following steps: (1) preparing a semiconductor substrate film coated with a metal nano coating; (2) preparing a metal coated nano channel chip; (3) preparing a light-electricity detection micro pool; (4) imaging by utilizing a metal coated nano channel dark field; (5) recording ion current intensity by utilizing the metal coated nano channel; (6) adding a to-be-detected object for synchronous light-electricity detection; and (7) analyzing multi-channel data. According to the method, the process that a single to-be-detected nano object can pass through the nano channel can be monitored dynamically in real time without introducing dye groups and labeling so as to acquire dynamic information such as the size, the electrification situation, the light property, the chemical structure of the to-be-detected object; the situation of variation of each type of nature of the single to-be-detected object in the moving process can be observed from multiple dimensionalities; multi-channel signals on a large scale can be acquired synchronously; the detection velocity of a nano channel technique is increased; the application field is widened.