The invention discloses an anti-erosion power-level slide valve in a hydraulic servo valve. The anti-erosion power-level slide valve is characterized in that a high-pressure oil port filter (26) is mounted at an inlet of an oil port P (28); a flow guide groove (32) is formed in the position, close to a valve port (33), of a valve element (1), and a flow guide terrace (31) is arranged on a valve sleeve (2); an oil port A (24) and an oil port T (19) form a valve port (23), a flow guide groove (21) is formed in the position, close to the valve port (23), of the valve element (1), and a flow guideterrace (22) is formed in the valve sleeve (2); an oil port B (14) and the oil port T (19) form a valve port (17), a flow guide groove (18) is formed in position, close to the valve port (17), of thevalve element (1), and a flow guide terrace (16) is arranged on the valve sleeve (2); and an oil port P (28) and the oil port B (14) form a valve port (11), a flow guide groove (12) is formed in theposition, close to the valve port (11), of the valve element (1), and a flow guide terrace (13) is arranged on the valve sleeve (2).