Lubricating oil way system, transmission and vehicle

The utility model provides a lubricating oil circuit system, transmission and vehicle, wherein the lubricating oil circuit system includes: the casing, be equipped with the cavity in the casing, be equipped with the oil collection cavity and the suction filtration cavity on the cavity wall of cavity, oil collection cavity with the cavity intercommunication, suction filtration cavity with oil collection cavity intercommunication, the cavity is equipped with a plurality of work area, the casing is equipped with a plurality of oil outlet hole, the oil outlet hole is equipped with a plurality of oil outlet holes. Each working area is communicated with at least one oil outlet hole; the filtering device is connected with the cavity wall of the cavity, and the filtering device is arranged in the suction filtering cavity; the oil pump is connected with the cavity wall of the cavity and provided with an oil inlet channel and an oil outlet channel, the oil inlet channel is communicated with the suction filtering cavity