"现金收支折现法" can be translated as "Discounted Cash Receipts and Payments Method" or more commonly and concisely as "Discounted Cash Flow (DCF) Method for Cash Receipts and Payments" in English.
However, in financial contexts, when referring to a method that values future cash flows by discounting them back to their present value, the term "Discounted Cash Flow (DCF) Method" is widely recognized and used. If you specifically want to emphasize the inclusion of both cash receipts (inflows) and payments (outflows) in the valuation, you could clarify it as "Discounted Cash Flow Method considering both Cash Receipts and Payments," though the core "DCF Method" is generally understood to encompass this aspect.
For simplicity and clarity in most professional settings, "Discounted Cash Flow (DCF) Method" would suffice.