Directional double-tooth self-balancing PDC drill bit suitable for soft and hard interlayers

The invention belongs to the technical field of oil field drilling equipment, and particularly relates to a directional double-tooth self-balancing PDC drill bit suitable for soft and hard interlayers. The drill bit comprises a drill bit body, blades and nozzles, and the blades and the nozzles are arranged on the drill bit body; and the number of the blades is five, double-tooth structures, front-row single teeth, rear-row conical teeth and gauge teeth are distributed on the blades, and the rear-row conical teeth are distributed behind the front-row single teeth on the same rail. The nozzles are distributed in the straight line area and the arc area of the crown part of each blade; the crown part of each blade is a straight line-arc crown part, and the cone depth of each crown part is moderate; and the lower part of the drill bit body is a male joint, the lower end is provided with a thread line, and a groove is turned in the middle part and facilitates screwing on a well. Single-tooth impact abrasion is redu