The utility model provides a disk type parking brake for an engineering truck and belongs to the technical field of automobile manufacturing. The parking brake comprises a brake disc (1) and is characterized in that the brake disc (1) is mounted in a gap between a front press plate (2) and a rear press plate (3); the front press plate (2) and the rear press plate (3) are connected into a whole through a connecting post, and a spring is arranged between the front press plate (2) and the rear press plate (3); a support (5) is mounted at the lower part of the rear press plate (3); a pressing device is arranged at the upper part of the front press plate (2) and connected with a parking stay wire (10); and the parking stay wire (10) can enable the pressing device to drive the front press plate (2) and the rear press plate (3) to move to the brake disc (1) and clamp the brake disc (1). The disk type parking brake for the engineering truck is simple in structure, hand brake parking can be realized with smaller force, and the load capacity of the engineering truck is improved.