If you wish to exchange your licence for a Spanish licence (and this is the method the Spanish Authorities prefer) you will need the following:
a) 4 passport photos 4张护照照片
b) Current driving licence + 2 copies 驾照及2份复印件
c) Residencia + 2 copies 居住证及2份复印件
d) Relevant Trafico form duly completed 相关的 申请表
In order to complete this process, Trafico will keep the documents for a minimum of three days, and the current charge is approx. 16 Euros. 3天 和 16欧元