Invoicing method and device, computer device and readable storage medium

The invention relates to an invoicing method and device, a computer device and a readable storage medium. The method comprises the following steps of receiving a selection instruction and a combined billing instruction for a plurality of sales orders; combining the plurality of sales orders according to the combined billing instruction and a preset combination rule to generate at least one sales order combination; and generating a corresponding invoice according to the sales order combination. According to the method, invoicing for each sales order one by one is not needed, invoice bills corresponding to each sales order can be generated in batches, and the invoicing efficiency for multiple sales orders is greatly improved. Besides, the computer device combines the multiple sales orders according to the combined billing instruction of the multiple sales orders and the preset combination rule, so that the various sales orders can be checked conveniently, and the working efficiency of financial staff is improve