The paper studied the ultimate bearing capacity, the fracture morphology and the crack development situation of diagonal section of the recycled brick aggregate concrete beam, and contrasted the beam with common concrete one. By analyzing the shear mechanism of the recycled brick coarse aggregate concrete beams, this paper provided a formula related to the shear capacity of recycled brick aggregate concrete beams. The results show that the fracture morphology and crack development of the recycled brick coarse aggregate concrete beam is similar to common concrete beam, but the ultimate bearing capacity is less then that of the common concrete beam. The formula can be used to calculate the bearing capacity of the recycled brick coarse aggregate concrete beam and contains a certain security reserve.