The invention relates to a composite rotary cutting type PDC drill bit. The composite rotary cutting type PDC drill bit comprises a body upper shell. A drilling tool joint is rotatably connected intothe body upper shell from top to bottom in a penetrating mode. A body lower shell capable of rotating synchronously with the drilling tool joint is rotatably arranged on the lower portion of the bodyupper shell in a sleeving mode. At least two drill bit blades are radially and symmetrically arranged at the bottom end of the body lower shell. At least two rotary cutting wheels are further radiallyand symmetrically arranged at the bottom end of the body lower shell, and the rotary cutting wheels and the drill bit blades are uniformly arranged in a staggered mode in the circumferential direction. The drill bit blades can rotate in the same direction with the drilling tool joint, and the rotary cutting wheels can rotate in the same direction with the drilling tool joint and rotate in the reverse direction. According to the composite rotary cutting type PDC drill bit, the drill bit blades can break rocks while the rotary cutting wheels can reversely break the rocks in a rotary cutting mode, the mechanical staggered type rock breaking under the hard plastic formation is achieved, the drilling efficiency and adaptability to the hard plastic formation are effectively improved, the drilling period is shortened, and the exploration and development benefits are improved.