Connecting device and solar photovoltaic power generation system

The utility model discloses a connecting device and a solar photovoltaic power generation system. The connecting device comprises a body and an elastic sheet. When the connecting device is installed, the bayonet of the body faces the photovoltaic panel and the support, a finger or a tool goes deep into the body from the opening and upwards abuts against the elastic piece, the elastic piece is made to be close to the inner wall of the body and keep away from the photovoltaic panel, the body is pushed, the photovoltaic panel and the support are inserted into the bayonet of the body, and then the finger or the tool is taken out from the opening. The elastic sheet abuts against the photovoltaic panel through the elastic force of the elastic sheet so as to fix the photovoltaic panel and the support. When the connecting device needs to be taken out, only the connecting device needs to be pulled to move in the direction away from the photovoltaic panel and the support, the elastic pieces incline in the direction tow