The invention relates to a new preparation method of cyclohexanone oxime solution in a caprolactam integrated process device, and discloses a preparation method of cyclohexanone oxime solution in a caprolactam integrated process; cyclohexanone oxime fed from the middle part of a solution preparing kettle and normal hexane fed from the bottom of the solution preparing kettle are prepared into a mixed solution. The feeding flow of cyclohexanone oxime is controlled and taken as reference to control the proportional feeding flow of normal hexane, so as to finally control the preparation concentration value of the cyclohexanone oxime solution. By providing scientific and reasonable concentration control value and optimized feeding method of cyclohexanone oxime, the method of the invention can effectively solve the problems of unclear concentration safety value and unstable concentration of cyclohexanone oxime in the prior art, so as to be beneficial to the stability and safety of subsequent rearrangement reactions.