The utility model discloses a tractor filter device with the sucked oil filtering function and the returned oil filtering function. The tractor filter device comprises a filter head, a sucked oil bypass valve, a screw, a filter drum, a sucked oil filter element, a returned oil bypass valve, a returned oil filter element, a first nut and a second nut. The sucked oil bypass valve is fixedly installed in the filter head, the sucked oil filter element and the returned oil filter element are installed in the filter drum from top to bottom, the returned oil bypass valve is fixedly installed on the returned oil filter element, and the filter head, the filter drum, the sucked oil filter element and the returned oil filter element are connected together through the screw and fixed through the first nut and the second nut. By means of the tractor filter device, a whole tractor hydraulic system can have the sucked oil filtering function and the returned oil filtering function only by carrying out replacement at the position, where an sucked oil filter is arranged, of an original tractor, and sufficient space can be reserved for achieving other functions of the tractor while the cleanliness of the oil of the whole hydraulic system is improved; meanwhile, sheet type heat dissipation plates are arranged outside the filter drum of the multifunctional filter device, heat dissipation of the tractor hydraulic system can be facilitated, and the reliability of the hydraulic system can be further improved.