Roof photovoltaic panel mounting and locking mechanism

The invention discloses a roof photovoltaic panel mounting and locking mechanism which comprises the components of a base which is detachably mounted on a roof; the multiple rows of stand columns are vertically arranged on the base, every two adjacent rows of stand columns are arranged in parallel, and the heights of the multiple rows of stand columns are sequentially increased or decreased; l-shaped limiting grooves are rotatably hinged to the inner sides of the top ends of every two adjacent rows of stand columns through pin shafts correspondingly, and a containing and clamping space is formed between every two oppositely-arranged L-shaped limiting grooves; by adjusting the angles between the L-shaped limiting grooves and the corresponding stand columns, the bottoms of every two adjacent opposite limiting plates are located on the same plane, the photovoltaic panel is detachably clamped between the two L-shaped limiting grooves, clamping is stable, and the photovoltaic panel can be protected when it rains d