Building aluminum profile convenient to cut

The building aluminum profile convenient to cut comprises an aluminum profile body, a groove is formed in the front face of the aluminum profile body, sliding grooves are formed in the top and the bottom of an inner cavity of the groove, a sliding block is movably connected to the inner cavity of the groove, and limiting grooves are formed in the top and the bottom of an inner cavity of the sliding block. Guide grooves are formed in the two sides of an inner cavity of the limiting groove, guide blocks are movably connected to inner cavities of the guide grooves, and moving plates are fixedly connected to the opposite sides of the guide blocks. According to the building aluminum profile cutting device, through cooperation of the aluminum profile body, the grooves, the sliding grooves, the sliding blocks, the limiting grooves, the guide grooves, the guide blocks, the movable plate, the springs, the supporting rods, the transverse plate, the guide wheels, the connecting plate and the positioning plate, the build