Hello, i'm a morrocan citizen ,i want to join my future wife in china (chenzhen city),

Dear, as for your situation, I think you can apply for a tourist L type to enter PRC and join your future wife.
Firstly, you need to prepare those documents: your passport and copy of its data page, the completed application form attached with a passport-style photo, an invitation letter from your future wife and copy of her ID card, travel insurance, bank statement, and your travel plan.
Secondly, submit the application to the embassy of Morocco to apply for it.