The utility model discloses a high-speed maneuvering type truck forklift. Wherein the auxiliary cab and the portal assembly are installed on a second-class automobile chassis. The arrangement direction of the auxiliary cab is opposite to that of a main cab of the second-class automobile chassis. The portal assembly is located on the rear portion of the second-class automobile chassis. A steering transmission system, a brake transmission system, a clutch transmission system and a forward/backward joystick control system which have a mechanical transmission function are arranged, so that linkageof related driving control actions of a co-driver cab and related control systems of a second-class automobile chassis is realized on the premise of not changing original electrical and hydraulic circuits of the second-class automobile chassis; two parallel hydraulic systems are arranged, so that the situation that in the gear shifting process of a truck forklift, a mechanical hydraulic pump stops working due to the short neutral gear state of a clutch, and consequently a main control valve loses pressure is avoided; the portal assembly is fixedly connected with the original truck frame through the auxiliary frame, and the overall strength of the truck forklift is improved.