Big data processing method and system based on ARIMA model

The invention is suitable for the field of computers, and provides a big data processing method and system based on an ARIMA model, and the method comprises the steps: obtaining the historical sales big data of a product, screening the historical sales data changing along with the time, and enabling the sales data to comprise the sales volume; building an ARIMA model according to the historical sales data, and predicting sales data of a plurality of periods backwards to obtain first sales prediction data; calculating increment of sales data of two adjacent periods in the first sales prediction data, and when the increment reaches a preset threshold value, calculating raw material increase data of the first production area according to a corresponding relation between the increment and production raw materials; and according to the raw material increase data, collecting the raw material balance data of the plurality of second production areas within the preset distance range, and according to the technical sch