Foreign rental income

Hi, if I have foreign rental income but I don’t transfer that money to UK, do I still need to report to HMRC, mean do self assessment because of this foreign income?

Hi
Yes, you are in receipt of foreign income, so you will need to complete a tax return.  
If you are resident and domiciled in the UK, you will need to report this foreign rental income on a self assessment tax return, regardless of whether you remit it to the UK or not.  
If you are resident and not domiciled in the UK, you can elect to use the remittance basis, on a self assessment tax return, but if you choose not to use the remittance basis, then you will have to declare it on the tax return, regardless of whether you remit the income to the UK or not.