The invention provides a technical improvement project profit evaluation method and device. The evaluation method comprises the steps that profit items involved in an improved project to be evaluatedare acquired according to the project category of the project to be evaluated; the profit of the profit items is calculated, and the profit data of the improved project to be evaluated are calculatedaccording to the profit; a first profit model is established according to the profit data in a predetermined period before improvement, and a second profit model is established according to the profitdata in the predetermined period after improvement; the Newton-Leibniz formula is used to calculate the difference between the first profit model and the second profit model to acquire the real-timeprofit after the project to be evaluated is improved; and the real-time profit is compared with a predetermined threshold to acquire the profit evaluation result of the project to be evaluated.