The invention discloses a clamping structure applied to the connection of a tile type photovoltaic module frame. The clamping structure comprises an upper clamping member, a lower clamping member, andan intermediate connecting member. The upper clamping member is provided with a first clamping portion for clamping an upper photovoltaic module and an L-shaped support portion for supporting the intermediate connecting member. The lower clamping member is provided with a second clamping portion for clamping a lower photovoltaic module, and an opening direction of the second clamping portion is opposite to an opening direction of the first clamping portion. The intermediate connecting member is set between the upper clamping member and the lower clamping member, one end of the intermediate connecting member is set on the L-shaped support portion of the upper clamping member, another opposite end is set on a support top surface of the lower clamping member, the intermediate connecting member and the lower clamping member are fixedly connected by a locking member which is set outside the upper clamping member. According to the clamping structure, the locking member is set outside a whole system, and at the same time, a separation type is adopted by upper and lower photovoltaic module clamping portions. When a photovoltaic module fails, the photovoltaic module can be quickly removedand replaced.