The invention discloses a gas rail assembly integrated with a filter. The gas rail assembly comprises a gas inlet joint, a gas outlet joint and a gas rail body; the gas rail body comprises an upper gas rail, a lower gas rail, the filter and natural gas ejectors; the filter is communicated with the gas inlet joint and an upper pressure stabilizing cavity; the natural gas ejectors are communicated with the upper pressure stabilizing cavity and a lower pressure stabilizing cavity, the lower pressure stabilizing cavity is communicated with the natural gas ejectors and the gas outlet joint, and at least two natural gas ejectors are arranged. The kinds of the natural gas ejectors comprise a fixed lift kind and a variable lift kind; according to the design, the filtering effect is good, the natural gas flow can be precisely controlled, the assembling efficiency is high, the service life of the gas rail assembly can be prolonged, integration is high, occupied space is small, the pressure stabilizing effect is high, and the manufacturing cost is low.