The invention provides an anti-misoperation forklift hydraulic system which comprises a hydraulic system formed by respectively supplying hydraulic oil in a hydraulic oil tank to an oblique oil cylinder and a lifting oil cylinder through a multi-way valve by a gear pump, wherein an integrated valve is arranged between the multi-way valve and the lifting oil cylinder, and two oil inlets of the integrated valve are respectively connected with oil outlet ends of the multi-way valve and the gear pump; the integrated valve is connected with a rodless cavity sequentially through a speed limiting valve and a cutoff valve; and an oil outlet of the integrated valve and a rod cavity of the lifting oil cylinder are connected with the hydraulic oil tank. The anti-misoperation forklift hydraulic system is safe and reliable, and the integrated valve is additionally arranged, so that the personal injury and the property loss caused due to misoperation are avoided; and besides, an unloading valve is arranged in the integrated valve, so that cargos can safely fall to the ground even when the system fails.