BIPV waterproof main beam

The utility model discloses a building integrated photovoltaics (BIPV) waterproof main beam which comprises a first cross beam and further comprises a jacking structure capable of preventing rainwater from laterally leaking, a clamping structure facilitating installation of a photovoltaic assembly and a rainwater guiding structure capable of preventing rainwater from leaking in the horizontal direction. A plurality of water guiding grooves are formed in the top end of the first cross beam, and the jacking structures are arranged in the water guiding grooves. The water guide plate is rotated, so that the rotating cylinder is sleeved on the fixed rod, and then the rotating cylinder is rotated around the mounting rod, so that the rotating cylinder moves along the outer wall of the fixed rod, and the water guide plate is fixed by limiting the mounting rod; therefore, rainwater sliding from the second photovoltaic module can directly fall on the surface of the first photovoltaic module through the water guide plat