The invention discloses an angle steel pillar and beam connector and a building pillar and beam connection structure and relates to an auxiliary connection tool for construction members in building structures. The angle steel pillar and beam connector comprises a long main body used for being connected with a building pillar body, and the long axis direction of the main body is in the shape of a W-shaped section. The main body comprises two intersected inner plates, the included angle of the inner plates is as same as the angle of corners of object pillar bodies, and any one inner plate is connected with an ear plate basically perpendicular to the inner plate. The angle steel pillar and beam connector can be fixed on the pillar bodies through the included angle formed by the inner plates, then beams are fixed on the ear plates of the angle steel pillar and beam connector, and therefore fixing of the pillars and the beams is achieved. The angle steel pillar and beam connector can be connected with two surfaces of each pillar through the two inner plates so that the connection stability is excellent.