The invention provides a clamping fixing device for a development module. The clamping fixing device is disposed to a product so as to fix the development module. The clamping fixing device includes an apparatus body and a clamping unit. The apparatus body includes a pedestal and a flip cover. The pedestal has a mounting groove. The flip cover has a flange and is in pivotal connection to the pedestal and the clamping unit is disposed inside the pedestal. When the development module is diposed in the mounting groove and the flip cover is folded, the flange pushes against the clamping unit so as to fix the development module. The clamping fixing device can address poor imaging quality caused by oscilation of the development module and can substantially save related cost of parts and components.