The invention discloses a fixed type crude oil washing machine, which comprises a body, a main shaft arranged in the body, a main driving part of the main shaft, a control mechanism of the main shaft, an impeller, a driving part of the impeller, a nozzle connected with the main shaft through a driving device, wherein the main driving part of the main shaft comprises a double-ended reciprocating threaded bush sleeved on the main shaft, the upper half part of the double-ended reciprocating threaded bush is sleeved with a connecting sleeve, while the lower half part is sleeved with a horizontal rotating sleeve; the connecting sleeve is sleeved with an upper worm wheel and a nut block, the horizontal rotating sleeve is sleeved with a lower worm wheel, and the upper worm wheel and the lower worm wheel are meshed with an upper worm and a lower worm respectively; a driving shifting block of the lower worm is connected with a one-way driving deflector rod of the upper worm; a one-way driving speed regulation swing stem of the upper worm is connected with the control mechanism of the main shaft; a rack driving device at the utmost low end of the main shaft is connected with the nozzle; and the nozzle comprises a nozzle body, a nozzle head, and two pieces of cross bearing helical blades are arranged in an inner hole of the nozzle head. By adopting the double-ended reciprocating threaded sleeve and parallel double worms, the rotation and the up and down movement of the main shaft can be realized simply and conveniently; and because the nozzle adopts the two pieces of the cross bearing helical blades, a jetting liquid column is in a spiral line form, and the fixed type crude oil washing machine is favorable for enhancing the washing effect and protecting a ship plate.