No. You are not allowed to withdraw your MPF account balance until you reach the age of 65, the stipulated retirement age.
However, you may apply for early withdrawal under the following circumstances: early retirement (at age 60); permanent departure from Hong Kong; death; total incapacity; terminal illness or a small balance (of HK$5,000 or less in account balance and subject to the relevant terms).
If you withdraw the accrued benefits on the ground of retirement at age 65 or early retirement at age 60, you can withdraw it in a lump sum or by instalments.