The invention discloses a rotation type cavitation erosion and erosive wear synergistic testing apparatus. A variable frequency motor is mounted at the upper end of a bell housing; the upper end of a stirring shaft is connected with the rotating shaft of the variable frequency motor through a coupler; the lower end of the stirring shaft penetrates through an upper cover plate and a lower cover plate of a turntable to be fixed; isosceles triangular test piece mounting grooves are uniformly distributed in the positions, which are located between the upper cover plate and the lower cover plate of the turntable and are 5/6 away from the circumferential radius; basic angles of the isosceles triangular test pieces are 45 degrees each; the vertical angles of the test piece mounting grooves face up and are identical in orientation; isosceles triangular cavitation induction unit grooves with different vertical angles are uniformly distributed in the positions which are located between the upper cover plate and the lower cover plate of the turntable and are 5/6 away from the circumferential radius at the interval of 90 degrees; the vertical angles of the isosceles triangular cavitation induction unit grooves are identical in orientation, and are opposite to the orientation of the vertical angles of the test piece mounting grooves; the test pieces with the same structure are respectively mounted in the test piece mounting grooves anticlockwise in the angles of 5 degrees, 95 degrees, 185 degrees and 275 degrees. The rotation type cavitation erosion and erosive wear synergistic testing apparatus disclosed by the invention can be applied to failure analysis, wear rate test, risk inspection and service life prediction for cavitation erosion and erosive wear damage of valves in the field of coal chemical industry.