Short circuit protection circuit and lighting device

The utility model provides a short circuit protection circuit and a lighting device. The short-circuit protection circuit comprises a rectifier module, a chopper module and a short-circuit protection module, the input end of the rectifier module is connected with a power supply module; the chopping module is respectively connected with the output end of the rectifier module and a light-emitting device; the short-circuit protection module is connected with the chopping module; the rectification module is configured to convert alternating current voltage provided by the power supply module into constant direct current voltage to be output; the chopping module is configured to perform chopping processing on the direct current voltage according to a dimming control signal and output the processed direct current voltage to the light emitting device; and the short circuit protection module is configured to change the level of the dimming control signal input to the chopping module when the light-emitting device is