The invention discloses a digging bucket. Through operation of extension and constriction of a bucket cylinder, a four bar mechanism composed of a bucket rod, a bucket body, a rocking bar and a three-point rocker arm is driven; and then through a hinge point of the bucket body and the three-point rocker arm, the other set of four bar mechanism composed of a bucket body, a three-point rocker arm, a draw bar and a scraper plate is driven so that soil loading and forced soil unloading in the process of digging are achieved. According to the digging bucket, under the working condition of digging clay, the digging bucket has special advantages. And the digging bucket is high in efficiency, reliable in performance, simple in structure, convenient to manufacture and low in cost.