What is the sword style in 大巧不工剑讲究的就是一个不工，意念要厚重，剑式要雄强圆厚...?
大巧不工 is from 《重剑无锋，大巧不工》



重 heavy
剑 sword
无 no
锋 sharp edge 
大 big 
巧 delicate  
不 no 
工 work


《重剑无锋，大巧不工》
Epee with no sharp edge, delicate work

The true power is not from the weapon, is from the one who uses it.

What is the sword style here called? 

Sword style means the the moves of the swordsman

Whats the translation of this passage???

大巧不工剑 is the name of the sword moves i assume.

讲究的就是一个不工 is all about natural (不工 not artificial) 

意念要厚重 thoughts must be strong

剑式要雄强圆厚 moves must be strong and round and thick (round and thick here means the moves must be flexible and comprehensive)

气势要庄严雄浑 momentum must be 庄严 Solemn and serious 雄浑(雄壮浩瀚: expansive)

你看看你使出的剑式，太过松散 look at your move, too loose

转折太过刚硬 moves transition too solid (not flexible)

致使出剑无力 causing your attack powerless

剑式笼罩的范围太小 area covered by your moves is too small