The invention discloses a visible hydraulic oil filter with a conveniently replaced filter element. The filter comprises a first housing, a second housing, a filter element and a monitor, wherein an oil inlet is formed at the head end of the first housing and a first filter element mounting groove is formed at the tail end of the first housing; an oil outlet is formed at the head end of the second housing and a second filter element mounting groove is formed at the tail end of the second housing; the first filter element mounting groove and the second filter element mounting groove are combined to form a filter element mounting cavity; the filter element is mounted in the filter element mounting cavity; a first cavity is formed in the first housing; a second cavity is formed in the second housing; the first cavity and the second cavity communicate with the outside through a first pipeline and a second pipeline, respectively; and two ends of the monitor are hermetically connected to the first pipeline and the second pipeline through connecting pipes. The visible hydraulic oil filter disclosed by the invention is reasonable in structure; the first housing and the second housing are simple to mount and disassemble; the filter element is conveniently replaced; and the monitor can monitor the pressure difference between two sides of the filter element in real time, so that damage caused by a high pressure difference on the structure of the filter element is avoided.